diff --git a/materials_pdfs/1.pdf b/materials/1.pdf similarity index 100% rename from materials_pdfs/1.pdf rename to materials/1.pdf diff --git a/materials_pdfs/10.pdf b/materials/10.pdf similarity index 100% rename from materials_pdfs/10.pdf rename to materials/10.pdf diff --git a/materials_pdfs/100.pdf b/materials/100.pdf similarity index 100% rename from materials_pdfs/100.pdf rename to materials/100.pdf diff --git a/materials_pdfs/101.pdf b/materials/101.pdf similarity index 100% rename from materials_pdfs/101.pdf rename to materials/101.pdf diff --git a/materials_pdfs/102.pdf b/materials/102.pdf similarity index 100% rename from materials_pdfs/102.pdf rename to materials/102.pdf diff --git a/materials_pdfs/103.pdf b/materials/103.pdf similarity index 100% rename from materials_pdfs/103.pdf rename to materials/103.pdf diff --git a/materials_pdfs/104.pdf b/materials/104.pdf similarity index 100% rename from materials_pdfs/104.pdf rename to materials/104.pdf diff --git a/materials_pdfs/105.pdf b/materials/105.pdf similarity index 100% rename from materials_pdfs/105.pdf rename to materials/105.pdf diff --git a/materials_pdfs/106.pdf b/materials/106.pdf similarity index 100% rename from materials_pdfs/106.pdf rename to materials/106.pdf diff --git a/materials_pdfs/107.pdf b/materials/107.pdf similarity index 100% rename from materials_pdfs/107.pdf rename to materials/107.pdf diff --git a/materials_pdfs/108.pdf b/materials/108.pdf similarity index 100% rename from materials_pdfs/108.pdf rename to materials/108.pdf diff --git a/materials_pdfs/109.pdf b/materials/109.pdf similarity index 100% rename from materials_pdfs/109.pdf rename to materials/109.pdf diff --git a/materials_pdfs/11.pdf b/materials/11.pdf similarity index 100% rename from materials_pdfs/11.pdf rename to materials/11.pdf diff --git a/materials_pdfs/110.pdf b/materials/110.pdf similarity index 100% rename from materials_pdfs/110.pdf rename to materials/110.pdf diff --git a/materials_pdfs/111.pdf b/materials/111.pdf similarity index 100% rename from materials_pdfs/111.pdf rename to materials/111.pdf diff --git a/materials_pdfs/112.pdf b/materials/112.pdf similarity index 100% rename from materials_pdfs/112.pdf rename to materials/112.pdf diff --git a/materials_pdfs/113.pdf b/materials/113.pdf similarity index 100% rename from materials_pdfs/113.pdf rename to materials/113.pdf diff --git a/materials_pdfs/114.pdf b/materials/114.pdf similarity index 100% rename from materials_pdfs/114.pdf rename to materials/114.pdf diff --git a/materials_pdfs/115.pdf b/materials/115.pdf similarity index 100% rename from materials_pdfs/115.pdf rename to materials/115.pdf diff --git a/materials_pdfs/116.pdf b/materials/116.pdf similarity index 100% rename from materials_pdfs/116.pdf rename to materials/116.pdf diff --git a/materials_pdfs/117.pdf b/materials/117.pdf similarity index 100% rename from materials_pdfs/117.pdf rename to materials/117.pdf diff --git a/materials_pdfs/118.pdf b/materials/118.pdf similarity index 100% rename from materials_pdfs/118.pdf rename to materials/118.pdf diff --git a/materials_pdfs/119.pdf b/materials/119.pdf similarity index 100% rename from materials_pdfs/119.pdf rename to materials/119.pdf diff --git a/materials_pdfs/12.pdf b/materials/12.pdf similarity index 100% rename from materials_pdfs/12.pdf rename to materials/12.pdf diff --git a/materials_pdfs/120.pdf b/materials/120.pdf similarity index 100% rename from materials_pdfs/120.pdf rename to materials/120.pdf diff --git a/materials_pdfs/121.pdf b/materials/121.pdf similarity index 100% rename from materials_pdfs/121.pdf rename to materials/121.pdf diff --git a/materials_pdfs/122.pdf b/materials/122.pdf similarity index 100% rename from materials_pdfs/122.pdf rename to materials/122.pdf diff --git a/materials_pdfs/123.pdf b/materials/123.pdf similarity index 100% rename from materials_pdfs/123.pdf rename to materials/123.pdf diff --git a/materials_pdfs/124.pdf b/materials/124.pdf similarity index 100% rename from materials_pdfs/124.pdf rename to materials/124.pdf diff --git a/materials_pdfs/125.pdf b/materials/125.pdf similarity index 100% rename from materials_pdfs/125.pdf rename to materials/125.pdf diff --git a/materials_pdfs/126.pdf b/materials/126.pdf similarity index 100% rename from materials_pdfs/126.pdf rename to materials/126.pdf diff --git a/materials_pdfs/127.pdf b/materials/127.pdf similarity index 100% rename from materials_pdfs/127.pdf rename to materials/127.pdf diff --git a/materials_pdfs/128.pdf b/materials/128.pdf similarity index 100% rename from materials_pdfs/128.pdf rename to materials/128.pdf diff --git a/materials_pdfs/129.pdf b/materials/129.pdf similarity index 100% rename from materials_pdfs/129.pdf rename to materials/129.pdf diff --git a/materials_pdfs/13.pdf b/materials/13.pdf similarity index 100% rename from materials_pdfs/13.pdf rename to materials/13.pdf diff --git a/materials_pdfs/130.pdf b/materials/130.pdf similarity index 100% rename from materials_pdfs/130.pdf rename to materials/130.pdf diff --git a/materials_pdfs/131.pdf b/materials/131.pdf similarity index 100% rename from materials_pdfs/131.pdf rename to materials/131.pdf diff --git a/materials_pdfs/132.pdf b/materials/132.pdf similarity index 100% rename from materials_pdfs/132.pdf rename to materials/132.pdf diff --git a/materials_pdfs/133.pdf b/materials/133.pdf similarity index 100% rename from materials_pdfs/133.pdf rename to materials/133.pdf diff --git a/materials_pdfs/134.pdf b/materials/134.pdf similarity index 100% rename from materials_pdfs/134.pdf rename to materials/134.pdf diff --git a/materials_pdfs/135.pdf b/materials/135.pdf similarity index 100% rename from materials_pdfs/135.pdf rename to materials/135.pdf diff --git a/materials_pdfs/136.pdf b/materials/136.pdf similarity index 100% rename from materials_pdfs/136.pdf rename to materials/136.pdf diff --git a/materials_pdfs/137.pdf b/materials/137.pdf similarity index 100% rename from materials_pdfs/137.pdf rename to materials/137.pdf diff --git a/materials_pdfs/138.pdf b/materials/138.pdf similarity index 100% rename from materials_pdfs/138.pdf rename to materials/138.pdf diff --git a/materials_pdfs/139.pdf b/materials/139.pdf similarity index 100% rename from materials_pdfs/139.pdf rename to materials/139.pdf diff --git a/materials_pdfs/14.pdf b/materials/14.pdf similarity index 100% rename from materials_pdfs/14.pdf rename to materials/14.pdf diff --git a/materials_pdfs/140.pdf b/materials/140.pdf similarity index 100% rename from materials_pdfs/140.pdf rename to materials/140.pdf diff --git a/materials_pdfs/141.pdf b/materials/141.pdf similarity index 100% rename from materials_pdfs/141.pdf rename to materials/141.pdf diff --git a/materials_pdfs/142.pdf b/materials/142.pdf similarity index 100% rename from materials_pdfs/142.pdf rename to materials/142.pdf diff --git a/materials_pdfs/144.pdf b/materials/144.pdf similarity index 100% rename from materials_pdfs/144.pdf rename to materials/144.pdf diff --git a/materials_pdfs/145.pdf b/materials/145.pdf similarity index 100% rename from materials_pdfs/145.pdf rename to materials/145.pdf diff --git a/materials_pdfs/146.pdf b/materials/146.pdf similarity index 100% rename from materials_pdfs/146.pdf rename to materials/146.pdf diff --git a/materials_pdfs/147.pdf b/materials/147.pdf similarity index 100% rename from materials_pdfs/147.pdf rename to materials/147.pdf diff --git a/materials_pdfs/148.pdf b/materials/148.pdf similarity index 100% rename from materials_pdfs/148.pdf rename to materials/148.pdf diff --git a/materials_pdfs/149.pdf b/materials/149.pdf similarity index 100% rename from materials_pdfs/149.pdf rename to materials/149.pdf diff --git a/materials_pdfs/15.pdf b/materials/15.pdf similarity index 100% rename from materials_pdfs/15.pdf rename to materials/15.pdf diff --git a/materials_pdfs/150.pdf b/materials/150.pdf similarity index 100% rename from materials_pdfs/150.pdf rename to materials/150.pdf diff --git a/materials_pdfs/151.pdf b/materials/151.pdf similarity index 100% rename from materials_pdfs/151.pdf rename to materials/151.pdf diff --git a/materials_pdfs/153.pdf b/materials/153.pdf similarity index 100% rename from materials_pdfs/153.pdf rename to materials/153.pdf diff --git a/materials_pdfs/154.pdf b/materials/154.pdf similarity index 100% rename from materials_pdfs/154.pdf rename to materials/154.pdf diff --git a/materials_pdfs/155.pdf b/materials/155.pdf similarity index 100% rename from materials_pdfs/155.pdf rename to materials/155.pdf diff --git a/materials_pdfs/156.pdf b/materials/156.pdf similarity index 100% rename from materials_pdfs/156.pdf rename to materials/156.pdf diff --git a/materials_pdfs/157.pdf b/materials/157.pdf similarity index 100% rename from materials_pdfs/157.pdf rename to materials/157.pdf diff --git a/materials_pdfs/158.pdf b/materials/158.pdf similarity index 100% rename from materials_pdfs/158.pdf rename to materials/158.pdf diff --git a/materials_pdfs/159.pdf b/materials/159.pdf similarity index 100% rename from materials_pdfs/159.pdf rename to materials/159.pdf diff --git a/materials_pdfs/16.pdf b/materials/16.pdf similarity index 100% rename from materials_pdfs/16.pdf rename to materials/16.pdf diff --git a/materials_pdfs/161.pdf b/materials/161.pdf similarity index 100% rename from materials_pdfs/161.pdf rename to materials/161.pdf diff --git a/materials_pdfs/163.pdf b/materials/163.pdf similarity index 100% rename from materials_pdfs/163.pdf rename to materials/163.pdf diff --git a/materials_pdfs/164.pdf b/materials/164.pdf similarity index 100% rename from materials_pdfs/164.pdf rename to materials/164.pdf diff --git a/materials_pdfs/165.pdf b/materials/165.pdf similarity index 100% rename from materials_pdfs/165.pdf rename to materials/165.pdf diff --git a/materials_pdfs/166.pdf b/materials/166.pdf similarity index 100% rename from materials_pdfs/166.pdf rename to materials/166.pdf diff --git a/materials_pdfs/167.pdf b/materials/167.pdf similarity index 100% rename from materials_pdfs/167.pdf rename to materials/167.pdf diff --git a/materials_pdfs/168.pdf b/materials/168.pdf similarity index 100% rename from materials_pdfs/168.pdf rename to materials/168.pdf diff --git a/materials_pdfs/169.pdf b/materials/169.pdf similarity index 100% rename from materials_pdfs/169.pdf rename to materials/169.pdf diff --git a/materials_pdfs/17.pdf b/materials/17.pdf similarity index 100% rename from materials_pdfs/17.pdf rename to materials/17.pdf diff --git a/materials_pdfs/173.pdf b/materials/173.pdf similarity index 100% rename from materials_pdfs/173.pdf rename to materials/173.pdf diff --git a/materials_pdfs/174.pdf b/materials/174.pdf similarity index 100% rename from materials_pdfs/174.pdf rename to materials/174.pdf diff --git a/materials_pdfs/175.pdf b/materials/175.pdf similarity index 100% rename from materials_pdfs/175.pdf rename to materials/175.pdf diff --git a/materials_pdfs/176.pdf b/materials/176.pdf similarity index 100% rename from materials_pdfs/176.pdf rename to materials/176.pdf diff --git a/materials_pdfs/177.pdf b/materials/177.pdf similarity index 100% rename from materials_pdfs/177.pdf rename to materials/177.pdf diff --git a/materials_pdfs/178.pdf b/materials/178.pdf similarity index 100% rename from materials_pdfs/178.pdf rename to materials/178.pdf diff --git a/materials_pdfs/179.pdf b/materials/179.pdf similarity index 100% rename from materials_pdfs/179.pdf rename to materials/179.pdf diff --git a/materials_pdfs/18.pdf b/materials/18.pdf similarity index 100% rename from materials_pdfs/18.pdf rename to materials/18.pdf diff --git a/materials_pdfs/180.pdf b/materials/180.pdf similarity index 100% rename from materials_pdfs/180.pdf rename to materials/180.pdf diff --git a/materials_pdfs/181.pdf b/materials/181.pdf similarity index 100% rename from materials_pdfs/181.pdf rename to materials/181.pdf diff --git a/materials_pdfs/182.pdf b/materials/182.pdf similarity index 100% rename from materials_pdfs/182.pdf rename to materials/182.pdf diff --git a/materials_pdfs/183.pdf b/materials/183.pdf similarity index 100% rename from materials_pdfs/183.pdf rename to materials/183.pdf diff --git a/materials_pdfs/184.pdf b/materials/184.pdf similarity index 100% rename from materials_pdfs/184.pdf rename to materials/184.pdf diff --git a/materials_pdfs/185.pdf b/materials/185.pdf similarity index 100% rename from materials_pdfs/185.pdf rename to materials/185.pdf diff --git a/materials_pdfs/186.pdf b/materials/186.pdf similarity index 100% rename from materials_pdfs/186.pdf rename to materials/186.pdf diff --git a/materials_pdfs/187.pdf b/materials/187.pdf similarity index 100% rename from materials_pdfs/187.pdf rename to materials/187.pdf diff --git a/materials_pdfs/188.pdf b/materials/188.pdf similarity index 100% rename from materials_pdfs/188.pdf rename to materials/188.pdf diff --git a/materials_pdfs/189.pdf b/materials/189.pdf similarity index 100% rename from materials_pdfs/189.pdf rename to materials/189.pdf diff --git a/materials_pdfs/19.pdf b/materials/19.pdf similarity index 100% rename from materials_pdfs/19.pdf rename to materials/19.pdf diff --git a/materials_pdfs/194.pdf b/materials/194.pdf similarity index 100% rename from materials_pdfs/194.pdf rename to materials/194.pdf diff --git a/materials_pdfs/195.pdf b/materials/195.pdf similarity index 100% rename from materials_pdfs/195.pdf rename to materials/195.pdf diff --git a/materials_pdfs/196.pdf b/materials/196.pdf similarity index 100% rename from materials_pdfs/196.pdf rename to materials/196.pdf diff --git a/materials_pdfs/197.pdf b/materials/197.pdf similarity index 100% rename from materials_pdfs/197.pdf rename to materials/197.pdf diff --git a/materials_pdfs/198.pdf b/materials/198.pdf similarity index 100% rename from materials_pdfs/198.pdf rename to materials/198.pdf diff --git a/materials_pdfs/199.pdf b/materials/199.pdf similarity index 100% rename from materials_pdfs/199.pdf rename to materials/199.pdf diff --git a/materials_pdfs/20.pdf b/materials/20.pdf similarity index 100% rename from materials_pdfs/20.pdf rename to materials/20.pdf diff --git a/materials_pdfs/200.pdf b/materials/200.pdf similarity index 100% rename from materials_pdfs/200.pdf rename to materials/200.pdf diff --git a/materials_pdfs/201.pdf b/materials/201.pdf similarity index 100% rename from materials_pdfs/201.pdf rename to materials/201.pdf diff --git a/materials_pdfs/202.pdf b/materials/202.pdf similarity index 100% rename from materials_pdfs/202.pdf rename to materials/202.pdf diff --git a/materials_pdfs/205.pdf b/materials/205.pdf similarity index 100% rename from materials_pdfs/205.pdf rename to materials/205.pdf diff --git a/materials_pdfs/206.pdf b/materials/206.pdf similarity index 100% rename from materials_pdfs/206.pdf rename to materials/206.pdf diff --git a/materials_pdfs/207.pdf b/materials/207.pdf similarity index 100% rename from materials_pdfs/207.pdf rename to materials/207.pdf diff --git a/materials_pdfs/208.pdf b/materials/208.pdf similarity index 100% rename from materials_pdfs/208.pdf rename to materials/208.pdf diff --git a/materials_pdfs/209.pdf b/materials/209.pdf similarity index 100% rename from materials_pdfs/209.pdf rename to materials/209.pdf diff --git a/materials_pdfs/21.pdf b/materials/21.pdf similarity index 100% rename from materials_pdfs/21.pdf rename to materials/21.pdf diff --git a/materials_pdfs/211.pdf b/materials/211.pdf similarity index 100% rename from materials_pdfs/211.pdf rename to materials/211.pdf diff --git a/materials_pdfs/212.pdf b/materials/212.pdf similarity index 100% rename from materials_pdfs/212.pdf rename to materials/212.pdf diff --git a/materials_pdfs/213.pdf b/materials/213.pdf similarity index 100% rename from materials_pdfs/213.pdf rename to materials/213.pdf diff --git a/materials_pdfs/214.pdf b/materials/214.pdf similarity index 100% rename from materials_pdfs/214.pdf rename to materials/214.pdf diff --git a/materials_pdfs/215.pdf b/materials/215.pdf similarity index 100% rename from materials_pdfs/215.pdf rename to materials/215.pdf diff --git a/materials_pdfs/216.pdf b/materials/216.pdf similarity index 100% rename from materials_pdfs/216.pdf rename to materials/216.pdf diff --git a/materials_pdfs/217.pdf b/materials/217.pdf similarity index 100% rename from materials_pdfs/217.pdf rename to materials/217.pdf diff --git a/materials_pdfs/218.pdf b/materials/218.pdf similarity index 100% rename from materials_pdfs/218.pdf rename to materials/218.pdf diff --git a/materials_pdfs/219.pdf b/materials/219.pdf similarity index 100% rename from materials_pdfs/219.pdf rename to materials/219.pdf diff --git a/materials_pdfs/22.pdf b/materials/22.pdf similarity index 100% rename from materials_pdfs/22.pdf rename to materials/22.pdf diff --git a/materials_pdfs/220.pdf b/materials/220.pdf similarity index 100% rename from materials_pdfs/220.pdf rename to materials/220.pdf diff --git a/materials_pdfs/221.pdf b/materials/221.pdf similarity index 100% rename from materials_pdfs/221.pdf rename to materials/221.pdf diff --git a/materials_pdfs/222.pdf b/materials/222.pdf similarity index 100% rename from materials_pdfs/222.pdf rename to materials/222.pdf diff --git a/materials_pdfs/223.pdf b/materials/223.pdf similarity index 100% rename from materials_pdfs/223.pdf rename to materials/223.pdf diff --git a/materials_pdfs/224.pdf b/materials/224.pdf similarity index 100% rename from materials_pdfs/224.pdf rename to materials/224.pdf diff --git a/materials_pdfs/225.pdf b/materials/225.pdf similarity index 100% rename from materials_pdfs/225.pdf rename to materials/225.pdf diff --git a/materials_pdfs/228.pdf b/materials/228.pdf similarity index 100% rename from materials_pdfs/228.pdf rename to materials/228.pdf diff --git a/materials_pdfs/229.pdf b/materials/229.pdf similarity index 100% rename from materials_pdfs/229.pdf rename to materials/229.pdf diff --git a/materials_pdfs/23.pdf b/materials/23.pdf similarity index 100% rename from materials_pdfs/23.pdf rename to materials/23.pdf diff --git a/materials_pdfs/230.pdf b/materials/230.pdf similarity index 100% rename from materials_pdfs/230.pdf rename to materials/230.pdf diff --git a/materials_pdfs/231.pdf b/materials/231.pdf similarity index 100% rename from materials_pdfs/231.pdf rename to materials/231.pdf diff --git a/materials_pdfs/232.pdf b/materials/232.pdf similarity index 100% rename from materials_pdfs/232.pdf rename to materials/232.pdf diff --git a/materials_pdfs/233.pdf b/materials/233.pdf similarity index 100% rename from materials_pdfs/233.pdf rename to materials/233.pdf diff --git a/materials_pdfs/234.pdf b/materials/234.pdf similarity index 100% rename from materials_pdfs/234.pdf rename to materials/234.pdf diff --git a/materials_pdfs/235.pdf b/materials/235.pdf similarity index 100% rename from materials_pdfs/235.pdf rename to materials/235.pdf diff --git a/materials_pdfs/236.pdf b/materials/236.pdf similarity index 100% rename from materials_pdfs/236.pdf rename to materials/236.pdf diff --git a/materials_pdfs/237.pdf b/materials/237.pdf similarity index 100% rename from materials_pdfs/237.pdf rename to materials/237.pdf diff --git a/materials_pdfs/238.pdf b/materials/238.pdf similarity index 100% rename from materials_pdfs/238.pdf rename to materials/238.pdf diff --git a/materials_pdfs/239.pdf b/materials/239.pdf similarity index 100% rename from materials_pdfs/239.pdf rename to materials/239.pdf diff --git a/materials_pdfs/24.pdf b/materials/24.pdf similarity index 100% rename from materials_pdfs/24.pdf rename to materials/24.pdf diff --git a/materials_pdfs/240.pdf b/materials/240.pdf similarity index 100% rename from materials_pdfs/240.pdf rename to materials/240.pdf diff --git a/materials_pdfs/241.pdf b/materials/241.pdf similarity index 100% rename from materials_pdfs/241.pdf rename to materials/241.pdf diff --git a/materials_pdfs/242.pdf b/materials/242.pdf similarity index 100% rename from materials_pdfs/242.pdf rename to materials/242.pdf diff --git a/materials_pdfs/243.pdf b/materials/243.pdf similarity index 100% rename from materials_pdfs/243.pdf rename to materials/243.pdf diff --git a/materials_pdfs/244.pdf b/materials/244.pdf similarity index 100% rename from materials_pdfs/244.pdf rename to materials/244.pdf diff --git a/materials_pdfs/245.pdf b/materials/245.pdf similarity index 100% rename from materials_pdfs/245.pdf rename to materials/245.pdf diff --git a/materials_pdfs/246.pdf b/materials/246.pdf similarity index 100% rename from materials_pdfs/246.pdf rename to materials/246.pdf diff --git a/materials_pdfs/247.pdf b/materials/247.pdf similarity index 100% rename from materials_pdfs/247.pdf rename to materials/247.pdf diff --git a/materials_pdfs/248.pdf b/materials/248.pdf similarity index 100% rename from materials_pdfs/248.pdf rename to materials/248.pdf diff --git a/materials_pdfs/249.pdf b/materials/249.pdf similarity index 100% rename from materials_pdfs/249.pdf rename to materials/249.pdf diff --git a/materials_pdfs/25.pdf b/materials/25.pdf similarity index 100% rename from materials_pdfs/25.pdf rename to materials/25.pdf diff --git a/materials_pdfs/250.pdf b/materials/250.pdf similarity index 100% rename from materials_pdfs/250.pdf rename to materials/250.pdf diff --git a/materials_pdfs/251.pdf b/materials/251.pdf similarity index 100% rename from materials_pdfs/251.pdf rename to materials/251.pdf diff --git a/materials_pdfs/252.pdf b/materials/252.pdf similarity index 100% rename from materials_pdfs/252.pdf rename to materials/252.pdf diff --git a/materials_pdfs/253.pdf b/materials/253.pdf similarity index 100% rename from materials_pdfs/253.pdf rename to materials/253.pdf diff --git a/materials_pdfs/254.pdf b/materials/254.pdf similarity index 100% rename from materials_pdfs/254.pdf rename to materials/254.pdf diff --git a/materials_pdfs/255.pdf b/materials/255.pdf similarity index 100% rename from materials_pdfs/255.pdf rename to materials/255.pdf diff --git a/materials_pdfs/256.pdf b/materials/256.pdf similarity index 100% rename from materials_pdfs/256.pdf rename to materials/256.pdf diff --git a/materials_pdfs/257.pdf b/materials/257.pdf similarity index 100% rename from materials_pdfs/257.pdf rename to materials/257.pdf diff --git a/materials_pdfs/258.pdf b/materials/258.pdf similarity index 100% rename from materials_pdfs/258.pdf rename to materials/258.pdf diff --git a/materials_pdfs/259.pdf b/materials/259.pdf similarity index 100% rename from materials_pdfs/259.pdf rename to materials/259.pdf diff --git a/materials_pdfs/26.pdf b/materials/26.pdf similarity index 100% rename from materials_pdfs/26.pdf rename to materials/26.pdf diff --git a/materials_pdfs/260.pdf b/materials/260.pdf similarity index 100% rename from materials_pdfs/260.pdf rename to materials/260.pdf diff --git a/materials_pdfs/261.pdf b/materials/261.pdf similarity index 100% rename from materials_pdfs/261.pdf rename to materials/261.pdf diff --git a/materials_pdfs/262.pdf b/materials/262.pdf similarity index 100% rename from materials_pdfs/262.pdf rename to materials/262.pdf diff --git a/materials_pdfs/263.pdf b/materials/263.pdf similarity index 100% rename from materials_pdfs/263.pdf rename to materials/263.pdf diff --git a/materials_pdfs/264.pdf b/materials/264.pdf similarity index 100% rename from materials_pdfs/264.pdf rename to materials/264.pdf diff --git a/materials_pdfs/265.pdf b/materials/265.pdf similarity index 100% rename from materials_pdfs/265.pdf rename to materials/265.pdf diff --git a/materials_pdfs/266.pdf b/materials/266.pdf similarity index 100% rename from materials_pdfs/266.pdf rename to materials/266.pdf diff --git a/materials_pdfs/268.pdf b/materials/268.pdf similarity index 100% rename from materials_pdfs/268.pdf rename to materials/268.pdf diff --git a/materials_pdfs/27.pdf b/materials/27.pdf similarity index 100% rename from materials_pdfs/27.pdf rename to materials/27.pdf diff --git a/materials_pdfs/270.pdf b/materials/270.pdf similarity index 100% rename from materials_pdfs/270.pdf rename to materials/270.pdf diff --git a/materials_pdfs/271.pdf b/materials/271.pdf similarity index 100% rename from materials_pdfs/271.pdf rename to materials/271.pdf diff --git a/materials_pdfs/278.pdf b/materials/278.pdf similarity index 100% rename from materials_pdfs/278.pdf rename to materials/278.pdf diff --git a/materials_pdfs/279.pdf b/materials/279.pdf similarity index 100% rename from materials_pdfs/279.pdf rename to materials/279.pdf diff --git a/materials_pdfs/28.pdf b/materials/28.pdf similarity index 100% rename from materials_pdfs/28.pdf rename to materials/28.pdf diff --git a/materials_pdfs/280.pdf b/materials/280.pdf similarity index 100% rename from materials_pdfs/280.pdf rename to materials/280.pdf diff --git a/materials_pdfs/281.pdf b/materials/281.pdf similarity index 100% rename from materials_pdfs/281.pdf rename to materials/281.pdf diff --git a/materials_pdfs/282.pdf b/materials/282.pdf similarity index 100% rename from materials_pdfs/282.pdf rename to materials/282.pdf diff --git a/materials_pdfs/283.pdf b/materials/283.pdf similarity index 100% rename from materials_pdfs/283.pdf rename to materials/283.pdf diff --git a/materials_pdfs/284.pdf b/materials/284.pdf similarity index 100% rename from materials_pdfs/284.pdf rename to materials/284.pdf diff --git a/materials_pdfs/285.pdf b/materials/285.pdf similarity index 100% rename from materials_pdfs/285.pdf rename to materials/285.pdf diff --git a/materials_pdfs/286.pdf b/materials/286.pdf similarity index 100% rename from materials_pdfs/286.pdf rename to materials/286.pdf diff --git a/materials_pdfs/287.pdf b/materials/287.pdf similarity index 100% rename from materials_pdfs/287.pdf rename to materials/287.pdf diff --git a/materials_pdfs/288.pdf b/materials/288.pdf similarity index 100% rename from materials_pdfs/288.pdf rename to materials/288.pdf diff --git a/materials_pdfs/289.pdf b/materials/289.pdf similarity index 100% rename from materials_pdfs/289.pdf rename to materials/289.pdf diff --git a/materials_pdfs/29.pdf b/materials/29.pdf similarity index 100% rename from materials_pdfs/29.pdf rename to materials/29.pdf diff --git a/materials_pdfs/290.pdf b/materials/290.pdf similarity index 100% rename from materials_pdfs/290.pdf rename to materials/290.pdf diff --git a/materials_pdfs/291.pdf b/materials/291.pdf similarity index 100% rename from materials_pdfs/291.pdf rename to materials/291.pdf diff --git a/materials_pdfs/292.pdf b/materials/292.pdf similarity index 100% rename from materials_pdfs/292.pdf rename to materials/292.pdf diff --git a/materials_pdfs/293.pdf b/materials/293.pdf similarity index 100% rename from materials_pdfs/293.pdf rename to materials/293.pdf diff --git a/materials_pdfs/294.pdf b/materials/294.pdf similarity index 100% rename from materials_pdfs/294.pdf rename to materials/294.pdf diff --git a/materials_pdfs/295.pdf b/materials/295.pdf similarity index 100% rename from materials_pdfs/295.pdf rename to materials/295.pdf diff --git a/materials_pdfs/296.pdf b/materials/296.pdf similarity index 100% rename from materials_pdfs/296.pdf rename to materials/296.pdf diff --git a/materials_pdfs/297.pdf b/materials/297.pdf similarity index 100% rename from materials_pdfs/297.pdf rename to materials/297.pdf diff --git a/materials_pdfs/298.pdf b/materials/298.pdf similarity index 100% rename from materials_pdfs/298.pdf rename to materials/298.pdf diff --git a/materials_pdfs/299.pdf b/materials/299.pdf similarity index 100% rename from materials_pdfs/299.pdf rename to materials/299.pdf diff --git a/materials_pdfs/30.pdf b/materials/30.pdf similarity index 100% rename from materials_pdfs/30.pdf rename to materials/30.pdf diff --git a/materials_pdfs/300.pdf b/materials/300.pdf similarity index 100% rename from materials_pdfs/300.pdf rename to materials/300.pdf diff --git a/materials_pdfs/301.pdf b/materials/301.pdf similarity index 100% rename from materials_pdfs/301.pdf rename to materials/301.pdf diff --git a/materials_pdfs/302.pdf b/materials/302.pdf similarity index 100% rename from materials_pdfs/302.pdf rename to materials/302.pdf diff --git a/materials_pdfs/303.pdf b/materials/303.pdf similarity index 100% rename from materials_pdfs/303.pdf rename to materials/303.pdf diff --git a/materials_pdfs/304.pdf b/materials/304.pdf similarity index 100% rename from materials_pdfs/304.pdf rename to materials/304.pdf diff --git a/materials_pdfs/305.pdf b/materials/305.pdf similarity index 100% rename from materials_pdfs/305.pdf rename to materials/305.pdf diff --git a/materials_pdfs/306.pdf b/materials/306.pdf similarity index 100% rename from materials_pdfs/306.pdf rename to materials/306.pdf diff --git a/materials_pdfs/307.pdf b/materials/307.pdf similarity index 100% rename from materials_pdfs/307.pdf rename to materials/307.pdf diff --git a/materials_pdfs/308.pdf b/materials/308.pdf similarity index 100% rename from materials_pdfs/308.pdf rename to materials/308.pdf diff --git a/materials_pdfs/309.pdf b/materials/309.pdf similarity index 100% rename from materials_pdfs/309.pdf rename to materials/309.pdf diff --git a/materials_pdfs/31.pdf b/materials/31.pdf similarity index 100% rename from materials_pdfs/31.pdf rename to materials/31.pdf diff --git a/materials_pdfs/310.pdf b/materials/310.pdf similarity index 100% rename from materials_pdfs/310.pdf rename to materials/310.pdf diff --git a/materials_pdfs/311.pdf b/materials/311.pdf similarity index 100% rename from materials_pdfs/311.pdf rename to materials/311.pdf diff --git a/materials_pdfs/312.pdf b/materials/312.pdf similarity index 100% rename from materials_pdfs/312.pdf rename to materials/312.pdf diff --git a/materials_pdfs/313.pdf b/materials/313.pdf similarity index 100% rename from materials_pdfs/313.pdf rename to materials/313.pdf diff --git a/materials_pdfs/314.pdf b/materials/314.pdf similarity index 100% rename from materials_pdfs/314.pdf rename to materials/314.pdf diff --git a/materials_pdfs/315.pdf b/materials/315.pdf similarity index 100% rename from materials_pdfs/315.pdf rename to materials/315.pdf diff --git a/materials_pdfs/316.pdf b/materials/316.pdf similarity index 100% rename from materials_pdfs/316.pdf rename to materials/316.pdf diff --git a/materials_pdfs/317.pdf b/materials/317.pdf similarity index 100% rename from materials_pdfs/317.pdf rename to materials/317.pdf diff --git a/materials_pdfs/318.pdf b/materials/318.pdf similarity index 100% rename from materials_pdfs/318.pdf rename to materials/318.pdf diff --git a/materials_pdfs/319.pdf b/materials/319.pdf similarity index 100% rename from materials_pdfs/319.pdf rename to materials/319.pdf diff --git a/materials_pdfs/32.pdf b/materials/32.pdf similarity index 100% rename from materials_pdfs/32.pdf rename to materials/32.pdf diff --git a/materials_pdfs/320.pdf b/materials/320.pdf similarity index 100% rename from materials_pdfs/320.pdf rename to materials/320.pdf diff --git a/materials_pdfs/321.pdf b/materials/321.pdf similarity index 100% rename from materials_pdfs/321.pdf rename to materials/321.pdf diff --git a/materials_pdfs/322.pdf b/materials/322.pdf similarity index 100% rename from materials_pdfs/322.pdf rename to materials/322.pdf diff --git a/materials_pdfs/323.pdf b/materials/323.pdf similarity index 100% rename from materials_pdfs/323.pdf rename to materials/323.pdf diff --git a/materials_pdfs/324.pdf b/materials/324.pdf similarity index 100% rename from materials_pdfs/324.pdf rename to materials/324.pdf diff --git a/materials_pdfs/325.pdf b/materials/325.pdf similarity index 100% rename from materials_pdfs/325.pdf rename to materials/325.pdf diff --git a/materials_pdfs/326.pdf b/materials/326.pdf similarity index 100% rename from materials_pdfs/326.pdf rename to materials/326.pdf diff --git a/materials_pdfs/327.pdf b/materials/327.pdf similarity index 100% rename from materials_pdfs/327.pdf rename to materials/327.pdf diff --git a/materials_pdfs/328.pdf b/materials/328.pdf similarity index 100% rename from materials_pdfs/328.pdf rename to materials/328.pdf diff --git a/materials_pdfs/329.pdf b/materials/329.pdf similarity index 100% rename from materials_pdfs/329.pdf rename to materials/329.pdf diff --git a/materials_pdfs/33.pdf b/materials/33.pdf similarity index 100% rename from materials_pdfs/33.pdf rename to materials/33.pdf diff --git a/materials_pdfs/330.pdf b/materials/330.pdf similarity index 100% rename from materials_pdfs/330.pdf rename to materials/330.pdf diff --git a/materials_pdfs/331.pdf b/materials/331.pdf similarity index 100% rename from materials_pdfs/331.pdf rename to materials/331.pdf diff --git a/materials_pdfs/332.pdf b/materials/332.pdf similarity index 100% rename from materials_pdfs/332.pdf rename to materials/332.pdf diff --git a/materials_pdfs/333.pdf b/materials/333.pdf similarity index 100% rename from materials_pdfs/333.pdf rename to materials/333.pdf diff --git a/materials_pdfs/334.pdf b/materials/334.pdf similarity index 100% rename from materials_pdfs/334.pdf rename to materials/334.pdf diff --git a/materials_pdfs/335.pdf b/materials/335.pdf similarity index 100% rename from materials_pdfs/335.pdf rename to materials/335.pdf diff --git a/materials_pdfs/336.pdf b/materials/336.pdf similarity index 100% rename from materials_pdfs/336.pdf rename to materials/336.pdf diff --git a/materials_pdfs/337.pdf b/materials/337.pdf similarity index 100% rename from materials_pdfs/337.pdf rename to materials/337.pdf diff --git a/materials_pdfs/338.pdf b/materials/338.pdf similarity index 100% rename from materials_pdfs/338.pdf rename to materials/338.pdf diff --git a/materials_pdfs/339.pdf b/materials/339.pdf similarity index 100% rename from materials_pdfs/339.pdf rename to materials/339.pdf diff --git a/materials_pdfs/34.pdf b/materials/34.pdf similarity index 100% rename from materials_pdfs/34.pdf rename to materials/34.pdf diff --git a/materials_pdfs/340.pdf b/materials/340.pdf similarity index 100% rename from materials_pdfs/340.pdf rename to materials/340.pdf diff --git a/materials_pdfs/341.pdf b/materials/341.pdf similarity index 100% rename from materials_pdfs/341.pdf rename to materials/341.pdf diff --git a/materials_pdfs/342.pdf b/materials/342.pdf similarity index 100% rename from materials_pdfs/342.pdf rename to materials/342.pdf diff --git a/materials_pdfs/343.pdf b/materials/343.pdf similarity index 100% rename from materials_pdfs/343.pdf rename to materials/343.pdf diff --git a/materials_pdfs/344.pdf b/materials/344.pdf similarity index 100% rename from materials_pdfs/344.pdf rename to materials/344.pdf diff --git a/materials_pdfs/345.pdf b/materials/345.pdf similarity index 100% rename from materials_pdfs/345.pdf rename to materials/345.pdf diff --git a/materials_pdfs/346.pdf b/materials/346.pdf similarity index 100% rename from materials_pdfs/346.pdf rename to materials/346.pdf diff --git a/materials_pdfs/347.pdf b/materials/347.pdf similarity index 100% rename from materials_pdfs/347.pdf rename to materials/347.pdf diff --git a/materials_pdfs/348.pdf b/materials/348.pdf similarity index 100% rename from materials_pdfs/348.pdf rename to materials/348.pdf diff --git a/materials_pdfs/349.pdf b/materials/349.pdf similarity index 100% rename from materials_pdfs/349.pdf rename to materials/349.pdf diff --git a/materials_pdfs/35.pdf b/materials/35.pdf similarity index 100% rename from materials_pdfs/35.pdf rename to materials/35.pdf diff --git a/materials_pdfs/350.pdf b/materials/350.pdf similarity index 100% rename from materials_pdfs/350.pdf rename to materials/350.pdf diff --git a/materials_pdfs/351.pdf b/materials/351.pdf similarity index 100% rename from materials_pdfs/351.pdf rename to materials/351.pdf diff --git a/materials_pdfs/353.pdf b/materials/353.pdf similarity index 100% rename from materials_pdfs/353.pdf rename to materials/353.pdf diff --git a/materials_pdfs/354.pdf b/materials/354.pdf similarity index 100% rename from materials_pdfs/354.pdf rename to materials/354.pdf diff --git a/materials_pdfs/355.pdf b/materials/355.pdf similarity index 100% rename from materials_pdfs/355.pdf rename to materials/355.pdf diff --git a/materials_pdfs/356.pdf b/materials/356.pdf similarity index 100% rename from materials_pdfs/356.pdf rename to materials/356.pdf diff --git a/materials_pdfs/357.pdf b/materials/357.pdf similarity index 100% rename from materials_pdfs/357.pdf rename to materials/357.pdf diff --git a/materials_pdfs/358.pdf b/materials/358.pdf similarity index 100% rename from materials_pdfs/358.pdf rename to materials/358.pdf diff --git a/materials_pdfs/359.pdf b/materials/359.pdf similarity index 100% rename from materials_pdfs/359.pdf rename to materials/359.pdf diff --git a/materials_pdfs/36.pdf b/materials/36.pdf similarity index 100% rename from materials_pdfs/36.pdf rename to materials/36.pdf diff --git a/materials_pdfs/360.pdf b/materials/360.pdf similarity index 100% rename from materials_pdfs/360.pdf rename to materials/360.pdf diff --git a/materials_pdfs/361.pdf b/materials/361.pdf similarity index 100% rename from materials_pdfs/361.pdf rename to materials/361.pdf diff --git a/materials_pdfs/362.pdf b/materials/362.pdf similarity index 100% rename from materials_pdfs/362.pdf rename to materials/362.pdf diff --git a/materials_pdfs/363.pdf b/materials/363.pdf similarity index 100% rename from materials_pdfs/363.pdf rename to materials/363.pdf diff --git a/materials_pdfs/364.pdf b/materials/364.pdf similarity index 100% rename from materials_pdfs/364.pdf rename to materials/364.pdf diff --git a/materials_pdfs/365.pdf b/materials/365.pdf similarity index 100% rename from materials_pdfs/365.pdf rename to materials/365.pdf diff --git a/materials_pdfs/366.pdf b/materials/366.pdf similarity index 100% rename from materials_pdfs/366.pdf rename to materials/366.pdf diff --git a/materials_pdfs/367.pdf b/materials/367.pdf similarity index 100% rename from materials_pdfs/367.pdf rename to materials/367.pdf diff --git a/materials_pdfs/368.pdf b/materials/368.pdf similarity index 100% rename from materials_pdfs/368.pdf rename to materials/368.pdf diff --git a/materials_pdfs/369.pdf b/materials/369.pdf similarity index 100% rename from materials_pdfs/369.pdf rename to materials/369.pdf diff --git a/materials_pdfs/37.pdf b/materials/37.pdf similarity index 100% rename from materials_pdfs/37.pdf rename to materials/37.pdf diff --git a/materials_pdfs/370.pdf b/materials/370.pdf similarity index 100% rename from materials_pdfs/370.pdf rename to materials/370.pdf diff --git a/materials_pdfs/372.pdf b/materials/372.pdf similarity index 100% rename from materials_pdfs/372.pdf rename to materials/372.pdf diff --git a/materials_pdfs/373.pdf b/materials/373.pdf similarity index 100% rename from materials_pdfs/373.pdf rename to materials/373.pdf diff --git a/materials_pdfs/374.pdf b/materials/374.pdf similarity index 100% rename from materials_pdfs/374.pdf rename to materials/374.pdf diff --git a/materials_pdfs/375.pdf b/materials/375.pdf similarity index 100% rename from materials_pdfs/375.pdf rename to materials/375.pdf diff --git a/materials_pdfs/376.pdf b/materials/376.pdf similarity index 100% rename from materials_pdfs/376.pdf rename to materials/376.pdf diff --git a/materials_pdfs/377.pdf b/materials/377.pdf similarity index 100% rename from materials_pdfs/377.pdf rename to materials/377.pdf diff --git a/materials_pdfs/378.pdf b/materials/378.pdf similarity index 100% rename from materials_pdfs/378.pdf rename to materials/378.pdf diff --git a/materials_pdfs/379.pdf b/materials/379.pdf similarity index 100% rename from materials_pdfs/379.pdf rename to materials/379.pdf diff --git a/materials_pdfs/38.pdf b/materials/38.pdf similarity index 100% rename from materials_pdfs/38.pdf rename to materials/38.pdf diff --git a/materials_pdfs/380.pdf b/materials/380.pdf similarity index 100% rename from materials_pdfs/380.pdf rename to materials/380.pdf diff --git a/materials_pdfs/381.pdf b/materials/381.pdf similarity index 100% rename from materials_pdfs/381.pdf rename to materials/381.pdf diff --git a/materials_pdfs/382.pdf b/materials/382.pdf similarity index 100% rename from materials_pdfs/382.pdf rename to materials/382.pdf diff --git a/materials_pdfs/383.pdf b/materials/383.pdf similarity index 100% rename from materials_pdfs/383.pdf rename to materials/383.pdf diff --git a/materials_pdfs/384.pdf b/materials/384.pdf similarity index 100% rename from materials_pdfs/384.pdf rename to materials/384.pdf diff --git a/materials_pdfs/385.pdf b/materials/385.pdf similarity index 100% rename from materials_pdfs/385.pdf rename to materials/385.pdf diff --git a/materials_pdfs/386.pdf b/materials/386.pdf similarity index 100% rename from materials_pdfs/386.pdf rename to materials/386.pdf diff --git a/materials_pdfs/387.pdf b/materials/387.pdf similarity index 100% rename from materials_pdfs/387.pdf rename to materials/387.pdf diff --git a/materials_pdfs/388.pdf b/materials/388.pdf similarity index 100% rename from materials_pdfs/388.pdf rename to materials/388.pdf diff --git a/materials_pdfs/389.pdf b/materials/389.pdf similarity index 100% rename from materials_pdfs/389.pdf rename to materials/389.pdf diff --git a/materials_pdfs/39.pdf b/materials/39.pdf similarity index 100% rename from materials_pdfs/39.pdf rename to materials/39.pdf diff --git a/materials_pdfs/390.pdf b/materials/390.pdf similarity index 100% rename from materials_pdfs/390.pdf rename to materials/390.pdf diff --git a/materials_pdfs/391.pdf b/materials/391.pdf similarity index 100% rename from materials_pdfs/391.pdf rename to materials/391.pdf diff --git a/materials_pdfs/392.pdf b/materials/392.pdf similarity index 100% rename from materials_pdfs/392.pdf rename to materials/392.pdf diff --git a/materials_pdfs/393.pdf b/materials/393.pdf similarity index 100% rename from materials_pdfs/393.pdf rename to materials/393.pdf diff --git a/materials_pdfs/394.pdf b/materials/394.pdf similarity index 100% rename from materials_pdfs/394.pdf rename to materials/394.pdf diff --git a/materials_pdfs/395.pdf b/materials/395.pdf similarity index 100% rename from materials_pdfs/395.pdf rename to materials/395.pdf diff --git a/materials_pdfs/396.pdf b/materials/396.pdf similarity index 100% rename from materials_pdfs/396.pdf rename to materials/396.pdf diff --git a/materials_pdfs/397.pdf b/materials/397.pdf similarity index 100% rename from materials_pdfs/397.pdf rename to materials/397.pdf diff --git a/materials_pdfs/398.pdf b/materials/398.pdf similarity index 100% rename from materials_pdfs/398.pdf rename to materials/398.pdf diff --git a/materials_pdfs/399.pdf b/materials/399.pdf similarity index 100% rename from materials_pdfs/399.pdf rename to materials/399.pdf diff --git a/materials_pdfs/40.pdf b/materials/40.pdf similarity index 100% rename from materials_pdfs/40.pdf rename to materials/40.pdf diff --git a/materials_pdfs/400.pdf b/materials/400.pdf similarity index 100% rename from materials_pdfs/400.pdf rename to materials/400.pdf diff --git a/materials_pdfs/401.pdf b/materials/401.pdf similarity index 100% rename from materials_pdfs/401.pdf rename to materials/401.pdf diff --git a/materials_pdfs/402.pdf b/materials/402.pdf similarity index 100% rename from materials_pdfs/402.pdf rename to materials/402.pdf diff --git a/materials_pdfs/403.pdf b/materials/403.pdf similarity index 100% rename from materials_pdfs/403.pdf rename to materials/403.pdf diff --git a/materials_pdfs/404.pdf b/materials/404.pdf similarity index 100% rename from materials_pdfs/404.pdf rename to materials/404.pdf diff --git a/materials_pdfs/406.pdf b/materials/406.pdf similarity index 100% rename from materials_pdfs/406.pdf rename to materials/406.pdf diff --git a/materials_pdfs/407.pdf b/materials/407.pdf similarity index 100% rename from materials_pdfs/407.pdf rename to materials/407.pdf diff --git a/materials_pdfs/408.pdf b/materials/408.pdf similarity index 100% rename from materials_pdfs/408.pdf rename to materials/408.pdf diff --git a/materials_pdfs/409.pdf b/materials/409.pdf similarity index 100% rename from materials_pdfs/409.pdf rename to materials/409.pdf diff --git a/materials_pdfs/41.pdf b/materials/41.pdf similarity index 100% rename from materials_pdfs/41.pdf rename to materials/41.pdf diff --git a/materials_pdfs/410.pdf b/materials/410.pdf similarity index 100% rename from materials_pdfs/410.pdf rename to materials/410.pdf diff --git a/materials_pdfs/411.pdf b/materials/411.pdf similarity index 100% rename from materials_pdfs/411.pdf rename to materials/411.pdf diff --git a/materials_pdfs/412.pdf b/materials/412.pdf similarity index 100% rename from materials_pdfs/412.pdf rename to materials/412.pdf diff --git a/materials_pdfs/413.pdf b/materials/413.pdf similarity index 100% rename from materials_pdfs/413.pdf rename to materials/413.pdf diff --git a/materials_pdfs/414.pdf b/materials/414.pdf similarity index 100% rename from materials_pdfs/414.pdf rename to materials/414.pdf diff --git a/materials_pdfs/415.pdf b/materials/415.pdf similarity index 100% rename from materials_pdfs/415.pdf rename to materials/415.pdf diff --git a/materials_pdfs/416.pdf b/materials/416.pdf similarity index 100% rename from materials_pdfs/416.pdf rename to materials/416.pdf diff --git a/materials_pdfs/417.pdf b/materials/417.pdf similarity index 100% rename from materials_pdfs/417.pdf rename to materials/417.pdf diff --git a/materials_pdfs/418.pdf b/materials/418.pdf similarity index 100% rename from materials_pdfs/418.pdf rename to materials/418.pdf diff --git a/materials_pdfs/419.pdf b/materials/419.pdf similarity index 100% rename from materials_pdfs/419.pdf rename to materials/419.pdf diff --git a/materials_pdfs/42.pdf b/materials/42.pdf similarity index 100% rename from materials_pdfs/42.pdf rename to materials/42.pdf diff --git a/materials_pdfs/420.pdf b/materials/420.pdf similarity index 100% rename from materials_pdfs/420.pdf rename to materials/420.pdf diff --git a/materials_pdfs/421.pdf b/materials/421.pdf similarity index 100% rename from materials_pdfs/421.pdf rename to materials/421.pdf diff --git a/materials_pdfs/422.pdf b/materials/422.pdf similarity index 100% rename from materials_pdfs/422.pdf rename to materials/422.pdf diff --git a/materials_pdfs/423.pdf b/materials/423.pdf similarity index 100% rename from materials_pdfs/423.pdf rename to materials/423.pdf diff --git a/materials_pdfs/424.pdf b/materials/424.pdf similarity index 100% rename from materials_pdfs/424.pdf rename to materials/424.pdf diff --git a/materials_pdfs/425.pdf b/materials/425.pdf similarity index 100% rename from materials_pdfs/425.pdf rename to materials/425.pdf diff --git a/materials_pdfs/426.pdf b/materials/426.pdf similarity index 100% rename from materials_pdfs/426.pdf rename to materials/426.pdf diff --git a/materials_pdfs/427.pdf b/materials/427.pdf similarity index 100% rename from materials_pdfs/427.pdf rename to materials/427.pdf diff --git a/materials_pdfs/428.pdf b/materials/428.pdf similarity index 100% rename from materials_pdfs/428.pdf rename to materials/428.pdf diff --git a/materials_pdfs/429.pdf b/materials/429.pdf similarity index 100% rename from materials_pdfs/429.pdf rename to materials/429.pdf diff --git a/materials_pdfs/43.pdf b/materials/43.pdf similarity index 100% rename from materials_pdfs/43.pdf rename to materials/43.pdf diff --git a/materials_pdfs/430.pdf b/materials/430.pdf similarity index 100% rename from materials_pdfs/430.pdf rename to materials/430.pdf diff --git a/materials_pdfs/431.pdf b/materials/431.pdf similarity index 100% rename from materials_pdfs/431.pdf rename to materials/431.pdf diff --git a/materials_pdfs/432.pdf b/materials/432.pdf similarity index 100% rename from materials_pdfs/432.pdf rename to materials/432.pdf diff --git a/materials_pdfs/433.pdf b/materials/433.pdf similarity index 100% rename from materials_pdfs/433.pdf rename to materials/433.pdf diff --git a/materials_pdfs/434.pdf b/materials/434.pdf similarity index 100% rename from materials_pdfs/434.pdf rename to materials/434.pdf diff --git a/materials_pdfs/435.pdf b/materials/435.pdf similarity index 100% rename from materials_pdfs/435.pdf rename to materials/435.pdf diff --git a/materials_pdfs/436.pdf b/materials/436.pdf similarity index 100% rename from materials_pdfs/436.pdf rename to materials/436.pdf diff --git a/materials_pdfs/437.pdf b/materials/437.pdf similarity index 100% rename from materials_pdfs/437.pdf rename to materials/437.pdf diff --git a/materials_pdfs/438.pdf b/materials/438.pdf similarity index 100% rename from materials_pdfs/438.pdf rename to materials/438.pdf diff --git a/materials_pdfs/439.pdf b/materials/439.pdf similarity index 100% rename from materials_pdfs/439.pdf rename to materials/439.pdf diff --git a/materials_pdfs/44.pdf b/materials/44.pdf similarity index 100% rename from materials_pdfs/44.pdf rename to materials/44.pdf diff --git a/materials_pdfs/440.pdf b/materials/440.pdf similarity index 100% rename from materials_pdfs/440.pdf rename to materials/440.pdf diff --git a/materials_pdfs/441.pdf b/materials/441.pdf similarity index 100% rename from materials_pdfs/441.pdf rename to materials/441.pdf diff --git a/materials_pdfs/442.pdf b/materials/442.pdf similarity index 100% rename from materials_pdfs/442.pdf rename to materials/442.pdf diff --git a/materials_pdfs/443.pdf b/materials/443.pdf similarity index 100% rename from materials_pdfs/443.pdf rename to materials/443.pdf diff --git a/materials_pdfs/444.pdf b/materials/444.pdf similarity index 100% rename from materials_pdfs/444.pdf rename to materials/444.pdf diff --git a/materials_pdfs/445.pdf b/materials/445.pdf similarity index 100% rename from materials_pdfs/445.pdf rename to materials/445.pdf diff --git a/materials_pdfs/446.pdf b/materials/446.pdf similarity index 100% rename from materials_pdfs/446.pdf rename to materials/446.pdf diff --git a/materials_pdfs/447.pdf b/materials/447.pdf similarity index 100% rename from materials_pdfs/447.pdf rename to materials/447.pdf diff --git a/materials_pdfs/448.pdf b/materials/448.pdf similarity index 100% rename from materials_pdfs/448.pdf rename to materials/448.pdf diff --git a/materials_pdfs/449.pdf b/materials/449.pdf similarity index 100% rename from materials_pdfs/449.pdf rename to materials/449.pdf diff --git a/materials_pdfs/45.pdf b/materials/45.pdf similarity index 100% rename from materials_pdfs/45.pdf rename to materials/45.pdf diff --git a/materials_pdfs/450.pdf b/materials/450.pdf similarity index 100% rename from materials_pdfs/450.pdf rename to materials/450.pdf diff --git a/materials_pdfs/451.pdf b/materials/451.pdf similarity index 100% rename from materials_pdfs/451.pdf rename to materials/451.pdf diff --git a/materials_pdfs/452.pdf b/materials/452.pdf similarity index 100% rename from materials_pdfs/452.pdf rename to materials/452.pdf diff --git a/materials_pdfs/453.pdf b/materials/453.pdf similarity index 100% rename from materials_pdfs/453.pdf rename to materials/453.pdf diff --git a/materials_pdfs/454.pdf b/materials/454.pdf similarity index 100% rename from materials_pdfs/454.pdf rename to materials/454.pdf diff --git a/materials_pdfs/455.pdf b/materials/455.pdf similarity index 100% rename from materials_pdfs/455.pdf rename to materials/455.pdf diff --git a/materials_pdfs/456.pdf b/materials/456.pdf similarity index 100% rename from materials_pdfs/456.pdf rename to materials/456.pdf diff --git a/materials_pdfs/457.pdf b/materials/457.pdf similarity index 100% rename from materials_pdfs/457.pdf rename to materials/457.pdf diff --git a/materials_pdfs/458.pdf b/materials/458.pdf similarity index 100% rename from materials_pdfs/458.pdf rename to materials/458.pdf diff --git a/materials_pdfs/459.pdf b/materials/459.pdf similarity index 100% rename from materials_pdfs/459.pdf rename to materials/459.pdf diff --git a/materials_pdfs/46.pdf b/materials/46.pdf similarity index 100% rename from materials_pdfs/46.pdf rename to materials/46.pdf diff --git a/materials_pdfs/460.pdf b/materials/460.pdf similarity index 100% rename from materials_pdfs/460.pdf rename to materials/460.pdf diff --git a/materials_pdfs/461.pdf b/materials/461.pdf similarity index 100% rename from materials_pdfs/461.pdf rename to materials/461.pdf diff --git a/materials_pdfs/462.pdf b/materials/462.pdf similarity index 100% rename from materials_pdfs/462.pdf rename to materials/462.pdf diff --git a/materials_pdfs/463.pdf b/materials/463.pdf similarity index 100% rename from materials_pdfs/463.pdf rename to materials/463.pdf diff --git a/materials_pdfs/464.pdf b/materials/464.pdf similarity index 100% rename from materials_pdfs/464.pdf rename to materials/464.pdf diff --git a/materials_pdfs/465.pdf b/materials/465.pdf similarity index 100% rename from materials_pdfs/465.pdf rename to materials/465.pdf diff --git a/materials_pdfs/466.pdf b/materials/466.pdf similarity index 100% rename from materials_pdfs/466.pdf rename to materials/466.pdf diff --git a/materials_pdfs/467.pdf b/materials/467.pdf similarity index 100% rename from materials_pdfs/467.pdf rename to materials/467.pdf diff --git a/materials_pdfs/468.pdf b/materials/468.pdf similarity index 100% rename from materials_pdfs/468.pdf rename to materials/468.pdf diff --git a/materials_pdfs/469.pdf b/materials/469.pdf similarity index 100% rename from materials_pdfs/469.pdf rename to materials/469.pdf diff --git a/materials_pdfs/47.pdf b/materials/47.pdf similarity index 100% rename from materials_pdfs/47.pdf rename to materials/47.pdf diff --git a/materials_pdfs/470.pdf b/materials/470.pdf similarity index 100% rename from materials_pdfs/470.pdf rename to materials/470.pdf diff --git a/materials_pdfs/471.pdf b/materials/471.pdf similarity index 100% rename from materials_pdfs/471.pdf rename to materials/471.pdf diff --git a/materials_pdfs/472.pdf b/materials/472.pdf similarity index 100% rename from materials_pdfs/472.pdf rename to materials/472.pdf diff --git a/materials_pdfs/473.pdf b/materials/473.pdf similarity index 100% rename from materials_pdfs/473.pdf rename to materials/473.pdf diff --git a/materials_pdfs/474.pdf b/materials/474.pdf similarity index 100% rename from materials_pdfs/474.pdf rename to materials/474.pdf diff --git a/materials_pdfs/475.pdf b/materials/475.pdf similarity index 100% rename from materials_pdfs/475.pdf rename to materials/475.pdf diff --git a/materials_pdfs/476.pdf b/materials/476.pdf similarity index 100% rename from materials_pdfs/476.pdf rename to materials/476.pdf diff --git a/materials_pdfs/477.pdf b/materials/477.pdf similarity index 100% rename from materials_pdfs/477.pdf rename to materials/477.pdf diff --git a/materials_pdfs/478.pdf b/materials/478.pdf similarity index 100% rename from materials_pdfs/478.pdf rename to materials/478.pdf diff --git a/materials_pdfs/479.pdf b/materials/479.pdf similarity index 100% rename from materials_pdfs/479.pdf rename to materials/479.pdf diff --git a/materials_pdfs/48.pdf b/materials/48.pdf similarity index 100% rename from materials_pdfs/48.pdf rename to materials/48.pdf diff --git a/materials_pdfs/480.pdf b/materials/480.pdf similarity index 100% rename from materials_pdfs/480.pdf rename to materials/480.pdf diff --git a/materials_pdfs/481.pdf b/materials/481.pdf similarity index 100% rename from materials_pdfs/481.pdf rename to materials/481.pdf diff --git a/materials_pdfs/482.pdf b/materials/482.pdf similarity index 100% rename from materials_pdfs/482.pdf rename to materials/482.pdf diff --git a/materials_pdfs/49.pdf b/materials/49.pdf similarity index 100% rename from materials_pdfs/49.pdf rename to materials/49.pdf diff --git a/materials_pdfs/50.pdf b/materials/50.pdf similarity index 100% rename from materials_pdfs/50.pdf rename to materials/50.pdf diff --git a/materials_pdfs/51.pdf b/materials/51.pdf similarity index 100% rename from materials_pdfs/51.pdf rename to materials/51.pdf diff --git a/materials_pdfs/52.pdf b/materials/52.pdf similarity index 100% rename from materials_pdfs/52.pdf rename to materials/52.pdf diff --git a/materials_pdfs/54.pdf b/materials/54.pdf similarity index 100% rename from materials_pdfs/54.pdf rename to materials/54.pdf diff --git a/materials_pdfs/55.pdf b/materials/55.pdf similarity index 100% rename from materials_pdfs/55.pdf rename to materials/55.pdf diff --git a/materials_pdfs/56.pdf b/materials/56.pdf similarity index 100% rename from materials_pdfs/56.pdf rename to materials/56.pdf diff --git a/materials_pdfs/6.pdf b/materials/6.pdf similarity index 100% rename from materials_pdfs/6.pdf rename to materials/6.pdf diff --git a/materials_pdfs/64.pdf b/materials/64.pdf similarity index 100% rename from materials_pdfs/64.pdf rename to materials/64.pdf diff --git a/materials_pdfs/65.pdf b/materials/65.pdf similarity index 100% rename from materials_pdfs/65.pdf rename to materials/65.pdf diff --git a/materials_pdfs/66.pdf b/materials/66.pdf similarity index 100% rename from materials_pdfs/66.pdf rename to materials/66.pdf diff --git a/materials_pdfs/67.pdf b/materials/67.pdf similarity index 100% rename from materials_pdfs/67.pdf rename to materials/67.pdf diff --git a/materials_pdfs/7.pdf b/materials/7.pdf similarity index 100% rename from materials_pdfs/7.pdf rename to materials/7.pdf diff --git a/materials_pdfs/70.pdf b/materials/70.pdf similarity index 100% rename from materials_pdfs/70.pdf rename to materials/70.pdf diff --git a/materials_pdfs/71.pdf b/materials/71.pdf similarity index 100% rename from materials_pdfs/71.pdf rename to materials/71.pdf diff --git a/materials_pdfs/72.pdf b/materials/72.pdf similarity index 100% rename from materials_pdfs/72.pdf rename to materials/72.pdf diff --git a/materials_pdfs/73.pdf b/materials/73.pdf similarity index 100% rename from materials_pdfs/73.pdf rename to materials/73.pdf diff --git a/materials_pdfs/74.pdf b/materials/74.pdf similarity index 100% rename from materials_pdfs/74.pdf rename to materials/74.pdf diff --git a/materials_pdfs/76.pdf b/materials/76.pdf similarity index 100% rename from materials_pdfs/76.pdf rename to materials/76.pdf diff --git a/materials_pdfs/77.pdf b/materials/77.pdf similarity index 100% rename from materials_pdfs/77.pdf rename to materials/77.pdf diff --git a/materials_pdfs/78.pdf b/materials/78.pdf similarity index 100% rename from materials_pdfs/78.pdf rename to materials/78.pdf diff --git a/materials_pdfs/79.pdf b/materials/79.pdf similarity index 100% rename from materials_pdfs/79.pdf rename to materials/79.pdf diff --git a/materials_pdfs/8.pdf b/materials/8.pdf similarity index 100% rename from materials_pdfs/8.pdf rename to materials/8.pdf diff --git a/materials_pdfs/80.pdf b/materials/80.pdf similarity index 100% rename from materials_pdfs/80.pdf rename to materials/80.pdf diff --git a/materials_pdfs/81.pdf b/materials/81.pdf similarity index 100% rename from materials_pdfs/81.pdf rename to materials/81.pdf diff --git a/materials_pdfs/82.pdf b/materials/82.pdf similarity index 100% rename from materials_pdfs/82.pdf rename to materials/82.pdf diff --git a/materials_pdfs/83.pdf b/materials/83.pdf similarity index 100% rename from materials_pdfs/83.pdf rename to materials/83.pdf diff --git a/materials_pdfs/84.pdf b/materials/84.pdf similarity index 100% rename from materials_pdfs/84.pdf rename to materials/84.pdf diff --git a/materials_pdfs/85.pdf b/materials/85.pdf similarity index 100% rename from materials_pdfs/85.pdf rename to materials/85.pdf diff --git a/materials_pdfs/86.pdf b/materials/86.pdf similarity index 100% rename from materials_pdfs/86.pdf rename to materials/86.pdf diff --git a/materials_pdfs/87.pdf b/materials/87.pdf similarity index 100% rename from materials_pdfs/87.pdf rename to materials/87.pdf diff --git a/materials_pdfs/88.pdf b/materials/88.pdf similarity index 100% rename from materials_pdfs/88.pdf rename to materials/88.pdf diff --git a/materials_pdfs/888.pdf b/materials/888.pdf similarity index 100% rename from materials_pdfs/888.pdf rename to materials/888.pdf diff --git a/materials_pdfs/889.pdf b/materials/889.pdf similarity index 100% rename from materials_pdfs/889.pdf rename to materials/889.pdf diff --git a/materials_pdfs/89.pdf b/materials/89.pdf similarity index 100% rename from materials_pdfs/89.pdf rename to materials/89.pdf diff --git a/materials_pdfs/890.pdf b/materials/890.pdf similarity index 100% rename from materials_pdfs/890.pdf rename to materials/890.pdf diff --git a/materials_pdfs/891.pdf b/materials/891.pdf similarity index 100% rename from materials_pdfs/891.pdf rename to materials/891.pdf diff --git a/materials_pdfs/892.pdf b/materials/892.pdf similarity index 100% rename from materials_pdfs/892.pdf rename to materials/892.pdf diff --git a/materials_pdfs/893.pdf b/materials/893.pdf similarity index 100% rename from materials_pdfs/893.pdf rename to materials/893.pdf diff --git a/materials_pdfs/894.pdf b/materials/894.pdf similarity index 100% rename from materials_pdfs/894.pdf rename to materials/894.pdf diff --git a/materials_pdfs/895.pdf b/materials/895.pdf similarity index 100% rename from materials_pdfs/895.pdf rename to materials/895.pdf diff --git a/materials_pdfs/896.pdf b/materials/896.pdf similarity index 100% rename from materials_pdfs/896.pdf rename to materials/896.pdf diff --git a/materials_pdfs/897.pdf b/materials/897.pdf similarity index 100% rename from materials_pdfs/897.pdf rename to materials/897.pdf diff --git a/materials_pdfs/898.pdf b/materials/898.pdf similarity index 100% rename from materials_pdfs/898.pdf rename to materials/898.pdf diff --git a/materials_pdfs/899.pdf b/materials/899.pdf similarity index 100% rename from materials_pdfs/899.pdf rename to materials/899.pdf diff --git a/materials_pdfs/9.pdf b/materials/9.pdf similarity index 100% rename from materials_pdfs/9.pdf rename to materials/9.pdf diff --git a/materials_pdfs/90.pdf b/materials/90.pdf similarity index 100% rename from materials_pdfs/90.pdf rename to materials/90.pdf diff --git a/materials_pdfs/900.pdf b/materials/900.pdf similarity index 100% rename from materials_pdfs/900.pdf rename to materials/900.pdf diff --git a/materials_pdfs/901.pdf b/materials/901.pdf similarity index 100% rename from materials_pdfs/901.pdf rename to materials/901.pdf diff --git a/materials_pdfs/902.pdf b/materials/902.pdf similarity index 100% rename from materials_pdfs/902.pdf rename to materials/902.pdf diff --git a/materials_pdfs/903.pdf b/materials/903.pdf similarity index 100% rename from materials_pdfs/903.pdf rename to materials/903.pdf diff --git a/materials_pdfs/904.pdf b/materials/904.pdf similarity index 100% rename from materials_pdfs/904.pdf rename to materials/904.pdf diff --git a/materials_pdfs/905.pdf b/materials/905.pdf similarity index 100% rename from materials_pdfs/905.pdf rename to materials/905.pdf diff --git a/materials_pdfs/906.pdf b/materials/906.pdf similarity index 100% rename from materials_pdfs/906.pdf rename to materials/906.pdf diff --git a/materials_pdfs/907.pdf b/materials/907.pdf similarity index 100% rename from materials_pdfs/907.pdf rename to materials/907.pdf diff --git a/materials_pdfs/908.pdf b/materials/908.pdf similarity index 100% rename from materials_pdfs/908.pdf rename to materials/908.pdf diff --git a/materials_pdfs/909.pdf b/materials/909.pdf similarity index 100% rename from materials_pdfs/909.pdf rename to materials/909.pdf diff --git a/materials_pdfs/91.pdf b/materials/91.pdf similarity index 100% rename from materials_pdfs/91.pdf rename to materials/91.pdf diff --git a/materials_pdfs/910.pdf b/materials/910.pdf similarity index 100% rename from materials_pdfs/910.pdf rename to materials/910.pdf diff --git a/materials_pdfs/911.pdf b/materials/911.pdf similarity index 100% rename from materials_pdfs/911.pdf rename to materials/911.pdf diff --git a/materials_pdfs/912.pdf b/materials/912.pdf similarity index 100% rename from materials_pdfs/912.pdf rename to materials/912.pdf diff --git a/materials_pdfs/913.pdf b/materials/913.pdf similarity index 100% rename from materials_pdfs/913.pdf rename to materials/913.pdf diff --git a/materials_pdfs/914.pdf b/materials/914.pdf similarity index 100% rename from materials_pdfs/914.pdf rename to materials/914.pdf diff --git a/materials_pdfs/915.pdf b/materials/915.pdf similarity index 100% rename from materials_pdfs/915.pdf rename to materials/915.pdf diff --git a/materials_pdfs/92.pdf b/materials/92.pdf similarity index 100% rename from materials_pdfs/92.pdf rename to materials/92.pdf diff --git a/materials_pdfs/93.pdf b/materials/93.pdf similarity index 100% rename from materials_pdfs/93.pdf rename to materials/93.pdf diff --git a/materials_pdfs/94.pdf b/materials/94.pdf similarity index 100% rename from materials_pdfs/94.pdf rename to materials/94.pdf diff --git a/materials_pdfs/943.pdf b/materials/943.pdf similarity index 100% rename from materials_pdfs/943.pdf rename to materials/943.pdf diff --git a/materials_pdfs/944.pdf b/materials/944.pdf similarity index 100% rename from materials_pdfs/944.pdf rename to materials/944.pdf diff --git a/materials_pdfs/946.pdf b/materials/946.pdf similarity index 100% rename from materials_pdfs/946.pdf rename to materials/946.pdf diff --git a/materials_pdfs/947.pdf b/materials/947.pdf similarity index 100% rename from materials_pdfs/947.pdf rename to materials/947.pdf diff --git a/materials_pdfs/948.pdf b/materials/948.pdf similarity index 100% rename from materials_pdfs/948.pdf rename to materials/948.pdf diff --git a/materials_pdfs/949.pdf b/materials/949.pdf similarity index 100% rename from materials_pdfs/949.pdf rename to materials/949.pdf diff --git a/materials_pdfs/95.pdf b/materials/95.pdf similarity index 100% rename from materials_pdfs/95.pdf rename to materials/95.pdf diff --git a/materials_pdfs/950.pdf b/materials/950.pdf similarity index 100% rename from materials_pdfs/950.pdf rename to materials/950.pdf diff --git a/materials_pdfs/951.pdf b/materials/951.pdf similarity index 100% rename from materials_pdfs/951.pdf rename to materials/951.pdf diff --git a/materials_pdfs/952.pdf b/materials/952.pdf similarity index 100% rename from materials_pdfs/952.pdf rename to materials/952.pdf diff --git a/materials_pdfs/953.pdf b/materials/953.pdf similarity index 100% rename from materials_pdfs/953.pdf rename to materials/953.pdf diff --git a/materials_pdfs/954.pdf b/materials/954.pdf similarity index 100% rename from materials_pdfs/954.pdf rename to materials/954.pdf diff --git a/materials_pdfs/955.pdf b/materials/955.pdf similarity index 100% rename from materials_pdfs/955.pdf rename to materials/955.pdf diff --git a/materials_pdfs/956.pdf b/materials/956.pdf similarity index 100% rename from materials_pdfs/956.pdf rename to materials/956.pdf diff --git a/materials_pdfs/957.pdf b/materials/957.pdf similarity index 100% rename from materials_pdfs/957.pdf rename to materials/957.pdf diff --git a/materials_pdfs/958.pdf b/materials/958.pdf similarity index 100% rename from materials_pdfs/958.pdf rename to materials/958.pdf diff --git a/materials_pdfs/959.pdf b/materials/959.pdf similarity index 100% rename from materials_pdfs/959.pdf rename to materials/959.pdf diff --git a/materials_pdfs/96.pdf b/materials/96.pdf similarity index 100% rename from materials_pdfs/96.pdf rename to materials/96.pdf diff --git a/materials_pdfs/960.pdf b/materials/960.pdf similarity index 100% rename from materials_pdfs/960.pdf rename to materials/960.pdf diff --git a/materials_pdfs/961.pdf b/materials/961.pdf similarity index 100% rename from materials_pdfs/961.pdf rename to materials/961.pdf diff --git a/materials_pdfs/962.pdf b/materials/962.pdf similarity index 100% rename from materials_pdfs/962.pdf rename to materials/962.pdf diff --git a/materials_pdfs/963.pdf b/materials/963.pdf similarity index 100% rename from materials_pdfs/963.pdf rename to materials/963.pdf diff --git a/materials_pdfs/964.pdf b/materials/964.pdf similarity index 100% rename from materials_pdfs/964.pdf rename to materials/964.pdf diff --git a/materials_pdfs/965.pdf b/materials/965.pdf similarity index 100% rename from materials_pdfs/965.pdf rename to materials/965.pdf diff --git a/materials_pdfs/97.pdf b/materials/97.pdf similarity index 100% rename from materials_pdfs/97.pdf rename to materials/97.pdf diff --git a/materials_pdfs/975.pdf b/materials/975.pdf similarity index 100% rename from materials_pdfs/975.pdf rename to materials/975.pdf diff --git a/materials_pdfs/98.pdf b/materials/98.pdf similarity index 100% rename from materials_pdfs/98.pdf rename to materials/98.pdf diff --git a/materials_pdfs/99.pdf b/materials/99.pdf similarity index 100% rename from materials_pdfs/99.pdf rename to materials/99.pdf diff --git a/materials_pdfs/Assessment.pdf b/materials/Assessment.pdf similarity index 100% rename from materials_pdfs/Assessment.pdf rename to materials/Assessment.pdf diff --git a/materials_pdfs/Library.pdf b/materials/Library.pdf similarity index 100% rename from materials_pdfs/Library.pdf rename to materials/Library.pdf diff --git a/materials_pdfs/europe.pdf b/materials/europe.pdf similarity index 100% rename from materials_pdfs/europe.pdf rename to materials/europe.pdf