diff --git a/train/shard.02601.mds b/train/chunk_004/shard.02601.mds
similarity index 100%
rename from train/shard.02601.mds
rename to train/chunk_004/shard.02601.mds
diff --git a/train/shard.02602.mds b/train/chunk_004/shard.02602.mds
similarity index 100%
rename from train/shard.02602.mds
rename to train/chunk_004/shard.02602.mds
diff --git a/train/shard.02603.mds b/train/chunk_004/shard.02603.mds
similarity index 100%
rename from train/shard.02603.mds
rename to train/chunk_004/shard.02603.mds
diff --git a/train/shard.02604.mds b/train/chunk_004/shard.02604.mds
similarity index 100%
rename from train/shard.02604.mds
rename to train/chunk_004/shard.02604.mds
diff --git a/train/shard.02605.mds b/train/chunk_004/shard.02605.mds
similarity index 100%
rename from train/shard.02605.mds
rename to train/chunk_004/shard.02605.mds
diff --git a/train/shard.02606.mds b/train/chunk_004/shard.02606.mds
similarity index 100%
rename from train/shard.02606.mds
rename to train/chunk_004/shard.02606.mds
diff --git a/train/shard.02607.mds b/train/chunk_004/shard.02607.mds
similarity index 100%
rename from train/shard.02607.mds
rename to train/chunk_004/shard.02607.mds
diff --git a/train/shard.02608.mds b/train/chunk_004/shard.02608.mds
similarity index 100%
rename from train/shard.02608.mds
rename to train/chunk_004/shard.02608.mds
diff --git a/train/shard.02609.mds b/train/chunk_004/shard.02609.mds
similarity index 100%
rename from train/shard.02609.mds
rename to train/chunk_004/shard.02609.mds
diff --git a/train/shard.02610.mds b/train/chunk_004/shard.02610.mds
similarity index 100%
rename from train/shard.02610.mds
rename to train/chunk_004/shard.02610.mds
diff --git a/train/shard.02611.mds b/train/chunk_004/shard.02611.mds
similarity index 100%
rename from train/shard.02611.mds
rename to train/chunk_004/shard.02611.mds
diff --git a/train/shard.02612.mds b/train/chunk_004/shard.02612.mds
similarity index 100%
rename from train/shard.02612.mds
rename to train/chunk_004/shard.02612.mds
diff --git a/train/shard.02613.mds b/train/chunk_004/shard.02613.mds
similarity index 100%
rename from train/shard.02613.mds
rename to train/chunk_004/shard.02613.mds
diff --git a/train/shard.02614.mds b/train/chunk_004/shard.02614.mds
similarity index 100%
rename from train/shard.02614.mds
rename to train/chunk_004/shard.02614.mds
diff --git a/train/shard.02615.mds b/train/chunk_004/shard.02615.mds
similarity index 100%
rename from train/shard.02615.mds
rename to train/chunk_004/shard.02615.mds
diff --git a/train/shard.02616.mds b/train/chunk_004/shard.02616.mds
similarity index 100%
rename from train/shard.02616.mds
rename to train/chunk_004/shard.02616.mds
diff --git a/train/shard.02617.mds b/train/chunk_004/shard.02617.mds
similarity index 100%
rename from train/shard.02617.mds
rename to train/chunk_004/shard.02617.mds
diff --git a/train/shard.02618.mds b/train/chunk_004/shard.02618.mds
similarity index 100%
rename from train/shard.02618.mds
rename to train/chunk_004/shard.02618.mds
diff --git a/train/shard.02619.mds b/train/chunk_004/shard.02619.mds
similarity index 100%
rename from train/shard.02619.mds
rename to train/chunk_004/shard.02619.mds
diff --git a/train/shard.02620.mds b/train/chunk_004/shard.02620.mds
similarity index 100%
rename from train/shard.02620.mds
rename to train/chunk_004/shard.02620.mds
diff --git a/train/shard.02621.mds b/train/chunk_004/shard.02621.mds
similarity index 100%
rename from train/shard.02621.mds
rename to train/chunk_004/shard.02621.mds
diff --git a/train/shard.02622.mds b/train/chunk_004/shard.02622.mds
similarity index 100%
rename from train/shard.02622.mds
rename to train/chunk_004/shard.02622.mds
diff --git a/train/shard.02623.mds b/train/chunk_004/shard.02623.mds
similarity index 100%
rename from train/shard.02623.mds
rename to train/chunk_004/shard.02623.mds
diff --git a/train/shard.02624.mds b/train/chunk_004/shard.02624.mds
similarity index 100%
rename from train/shard.02624.mds
rename to train/chunk_004/shard.02624.mds
diff --git a/train/shard.02625.mds b/train/chunk_004/shard.02625.mds
similarity index 100%
rename from train/shard.02625.mds
rename to train/chunk_004/shard.02625.mds
diff --git a/train/shard.02626.mds b/train/chunk_004/shard.02626.mds
similarity index 100%
rename from train/shard.02626.mds
rename to train/chunk_004/shard.02626.mds
diff --git a/train/shard.02627.mds b/train/chunk_004/shard.02627.mds
similarity index 100%
rename from train/shard.02627.mds
rename to train/chunk_004/shard.02627.mds
diff --git a/train/shard.02628.mds b/train/chunk_004/shard.02628.mds
similarity index 100%
rename from train/shard.02628.mds
rename to train/chunk_004/shard.02628.mds
diff --git a/train/shard.02629.mds b/train/chunk_004/shard.02629.mds
similarity index 100%
rename from train/shard.02629.mds
rename to train/chunk_004/shard.02629.mds
diff --git a/train/shard.02630.mds b/train/chunk_004/shard.02630.mds
similarity index 100%
rename from train/shard.02630.mds
rename to train/chunk_004/shard.02630.mds
diff --git a/train/shard.02631.mds b/train/chunk_004/shard.02631.mds
similarity index 100%
rename from train/shard.02631.mds
rename to train/chunk_004/shard.02631.mds
diff --git a/train/shard.02632.mds b/train/chunk_004/shard.02632.mds
similarity index 100%
rename from train/shard.02632.mds
rename to train/chunk_004/shard.02632.mds
diff --git a/train/shard.02633.mds b/train/chunk_004/shard.02633.mds
similarity index 100%
rename from train/shard.02633.mds
rename to train/chunk_004/shard.02633.mds
diff --git a/train/shard.02634.mds b/train/chunk_004/shard.02634.mds
similarity index 100%
rename from train/shard.02634.mds
rename to train/chunk_004/shard.02634.mds
diff --git a/train/shard.02635.mds b/train/chunk_004/shard.02635.mds
similarity index 100%
rename from train/shard.02635.mds
rename to train/chunk_004/shard.02635.mds
diff --git a/train/shard.02636.mds b/train/chunk_004/shard.02636.mds
similarity index 100%
rename from train/shard.02636.mds
rename to train/chunk_004/shard.02636.mds
diff --git a/train/shard.02637.mds b/train/chunk_004/shard.02637.mds
similarity index 100%
rename from train/shard.02637.mds
rename to train/chunk_004/shard.02637.mds
diff --git a/train/shard.02638.mds b/train/chunk_004/shard.02638.mds
similarity index 100%
rename from train/shard.02638.mds
rename to train/chunk_004/shard.02638.mds
diff --git a/train/shard.02639.mds b/train/chunk_004/shard.02639.mds
similarity index 100%
rename from train/shard.02639.mds
rename to train/chunk_004/shard.02639.mds
diff --git a/train/shard.02640.mds b/train/chunk_004/shard.02640.mds
similarity index 100%
rename from train/shard.02640.mds
rename to train/chunk_004/shard.02640.mds
diff --git a/train/shard.02641.mds b/train/chunk_004/shard.02641.mds
similarity index 100%
rename from train/shard.02641.mds
rename to train/chunk_004/shard.02641.mds
diff --git a/train/shard.02642.mds b/train/chunk_004/shard.02642.mds
similarity index 100%
rename from train/shard.02642.mds
rename to train/chunk_004/shard.02642.mds
diff --git a/train/shard.02643.mds b/train/chunk_004/shard.02643.mds
similarity index 100%
rename from train/shard.02643.mds
rename to train/chunk_004/shard.02643.mds
diff --git a/train/shard.02644.mds b/train/chunk_004/shard.02644.mds
similarity index 100%
rename from train/shard.02644.mds
rename to train/chunk_004/shard.02644.mds
diff --git a/train/shard.02645.mds b/train/chunk_004/shard.02645.mds
similarity index 100%
rename from train/shard.02645.mds
rename to train/chunk_004/shard.02645.mds
diff --git a/train/shard.02646.mds b/train/chunk_004/shard.02646.mds
similarity index 100%
rename from train/shard.02646.mds
rename to train/chunk_004/shard.02646.mds
diff --git a/train/shard.02647.mds b/train/chunk_004/shard.02647.mds
similarity index 100%
rename from train/shard.02647.mds
rename to train/chunk_004/shard.02647.mds
diff --git a/train/shard.02648.mds b/train/chunk_004/shard.02648.mds
similarity index 100%
rename from train/shard.02648.mds
rename to train/chunk_004/shard.02648.mds
diff --git a/train/shard.02649.mds b/train/chunk_004/shard.02649.mds
similarity index 100%
rename from train/shard.02649.mds
rename to train/chunk_004/shard.02649.mds
diff --git a/train/shard.02650.mds b/train/chunk_004/shard.02650.mds
similarity index 100%
rename from train/shard.02650.mds
rename to train/chunk_004/shard.02650.mds
diff --git a/train/shard.02651.mds b/train/chunk_004/shard.02651.mds
similarity index 100%
rename from train/shard.02651.mds
rename to train/chunk_004/shard.02651.mds
diff --git a/train/shard.02652.mds b/train/chunk_004/shard.02652.mds
similarity index 100%
rename from train/shard.02652.mds
rename to train/chunk_004/shard.02652.mds
diff --git a/train/shard.02653.mds b/train/chunk_004/shard.02653.mds
similarity index 100%
rename from train/shard.02653.mds
rename to train/chunk_004/shard.02653.mds
diff --git a/train/shard.02654.mds b/train/chunk_004/shard.02654.mds
similarity index 100%
rename from train/shard.02654.mds
rename to train/chunk_004/shard.02654.mds
diff --git a/train/shard.02655.mds b/train/chunk_004/shard.02655.mds
similarity index 100%
rename from train/shard.02655.mds
rename to train/chunk_004/shard.02655.mds
diff --git a/train/shard.02656.mds b/train/chunk_004/shard.02656.mds
similarity index 100%
rename from train/shard.02656.mds
rename to train/chunk_004/shard.02656.mds
diff --git a/train/shard.02657.mds b/train/chunk_004/shard.02657.mds
similarity index 100%
rename from train/shard.02657.mds
rename to train/chunk_004/shard.02657.mds
diff --git a/train/shard.02658.mds b/train/chunk_004/shard.02658.mds
similarity index 100%
rename from train/shard.02658.mds
rename to train/chunk_004/shard.02658.mds
diff --git a/train/shard.02659.mds b/train/chunk_004/shard.02659.mds
similarity index 100%
rename from train/shard.02659.mds
rename to train/chunk_004/shard.02659.mds
diff --git a/train/shard.02660.mds b/train/chunk_004/shard.02660.mds
similarity index 100%
rename from train/shard.02660.mds
rename to train/chunk_004/shard.02660.mds
diff --git a/train/shard.02661.mds b/train/chunk_004/shard.02661.mds
similarity index 100%
rename from train/shard.02661.mds
rename to train/chunk_004/shard.02661.mds
diff --git a/train/shard.02662.mds b/train/chunk_004/shard.02662.mds
similarity index 100%
rename from train/shard.02662.mds
rename to train/chunk_004/shard.02662.mds
diff --git a/train/shard.02663.mds b/train/chunk_004/shard.02663.mds
similarity index 100%
rename from train/shard.02663.mds
rename to train/chunk_004/shard.02663.mds
diff --git a/train/shard.02664.mds b/train/chunk_004/shard.02664.mds
similarity index 100%
rename from train/shard.02664.mds
rename to train/chunk_004/shard.02664.mds
diff --git a/train/shard.02665.mds b/train/chunk_004/shard.02665.mds
similarity index 100%
rename from train/shard.02665.mds
rename to train/chunk_004/shard.02665.mds
diff --git a/train/shard.02666.mds b/train/chunk_004/shard.02666.mds
similarity index 100%
rename from train/shard.02666.mds
rename to train/chunk_004/shard.02666.mds
diff --git a/train/shard.02667.mds b/train/chunk_004/shard.02667.mds
similarity index 100%
rename from train/shard.02667.mds
rename to train/chunk_004/shard.02667.mds
diff --git a/train/shard.02668.mds b/train/chunk_004/shard.02668.mds
similarity index 100%
rename from train/shard.02668.mds
rename to train/chunk_004/shard.02668.mds
diff --git a/train/shard.02669.mds b/train/chunk_004/shard.02669.mds
similarity index 100%
rename from train/shard.02669.mds
rename to train/chunk_004/shard.02669.mds
diff --git a/train/shard.02670.mds b/train/chunk_004/shard.02670.mds
similarity index 100%
rename from train/shard.02670.mds
rename to train/chunk_004/shard.02670.mds
diff --git a/train/shard.02671.mds b/train/chunk_004/shard.02671.mds
similarity index 100%
rename from train/shard.02671.mds
rename to train/chunk_004/shard.02671.mds
diff --git a/train/shard.02672.mds b/train/chunk_004/shard.02672.mds
similarity index 100%
rename from train/shard.02672.mds
rename to train/chunk_004/shard.02672.mds
diff --git a/train/shard.02673.mds b/train/chunk_004/shard.02673.mds
similarity index 100%
rename from train/shard.02673.mds
rename to train/chunk_004/shard.02673.mds
diff --git a/train/shard.02674.mds b/train/chunk_004/shard.02674.mds
similarity index 100%
rename from train/shard.02674.mds
rename to train/chunk_004/shard.02674.mds
diff --git a/train/shard.02675.mds b/train/chunk_004/shard.02675.mds
similarity index 100%
rename from train/shard.02675.mds
rename to train/chunk_004/shard.02675.mds
diff --git a/train/shard.02676.mds b/train/chunk_004/shard.02676.mds
similarity index 100%
rename from train/shard.02676.mds
rename to train/chunk_004/shard.02676.mds
diff --git a/train/shard.02677.mds b/train/chunk_004/shard.02677.mds
similarity index 100%
rename from train/shard.02677.mds
rename to train/chunk_004/shard.02677.mds
diff --git a/train/shard.02678.mds b/train/chunk_004/shard.02678.mds
similarity index 100%
rename from train/shard.02678.mds
rename to train/chunk_004/shard.02678.mds
diff --git a/train/shard.02679.mds b/train/chunk_004/shard.02679.mds
similarity index 100%
rename from train/shard.02679.mds
rename to train/chunk_004/shard.02679.mds
diff --git a/train/shard.02680.mds b/train/chunk_004/shard.02680.mds
similarity index 100%
rename from train/shard.02680.mds
rename to train/chunk_004/shard.02680.mds
diff --git a/train/shard.02681.mds b/train/chunk_004/shard.02681.mds
similarity index 100%
rename from train/shard.02681.mds
rename to train/chunk_004/shard.02681.mds
diff --git a/train/shard.02682.mds b/train/chunk_004/shard.02682.mds
similarity index 100%
rename from train/shard.02682.mds
rename to train/chunk_004/shard.02682.mds
diff --git a/train/shard.02683.mds b/train/chunk_004/shard.02683.mds
similarity index 100%
rename from train/shard.02683.mds
rename to train/chunk_004/shard.02683.mds
diff --git a/train/shard.02684.mds b/train/chunk_004/shard.02684.mds
similarity index 100%
rename from train/shard.02684.mds
rename to train/chunk_004/shard.02684.mds
diff --git a/train/shard.02685.mds b/train/chunk_004/shard.02685.mds
similarity index 100%
rename from train/shard.02685.mds
rename to train/chunk_004/shard.02685.mds
diff --git a/train/shard.02686.mds b/train/chunk_004/shard.02686.mds
similarity index 100%
rename from train/shard.02686.mds
rename to train/chunk_004/shard.02686.mds
diff --git a/train/shard.02687.mds b/train/chunk_004/shard.02687.mds
similarity index 100%
rename from train/shard.02687.mds
rename to train/chunk_004/shard.02687.mds
diff --git a/train/shard.02688.mds b/train/chunk_004/shard.02688.mds
similarity index 100%
rename from train/shard.02688.mds
rename to train/chunk_004/shard.02688.mds
diff --git a/train/shard.02689.mds b/train/chunk_004/shard.02689.mds
similarity index 100%
rename from train/shard.02689.mds
rename to train/chunk_004/shard.02689.mds
diff --git a/train/shard.02690.mds b/train/chunk_004/shard.02690.mds
similarity index 100%
rename from train/shard.02690.mds
rename to train/chunk_004/shard.02690.mds
diff --git a/train/shard.02691.mds b/train/chunk_004/shard.02691.mds
similarity index 100%
rename from train/shard.02691.mds
rename to train/chunk_004/shard.02691.mds
diff --git a/train/shard.02692.mds b/train/chunk_004/shard.02692.mds
similarity index 100%
rename from train/shard.02692.mds
rename to train/chunk_004/shard.02692.mds
diff --git a/train/shard.02693.mds b/train/chunk_004/shard.02693.mds
similarity index 100%
rename from train/shard.02693.mds
rename to train/chunk_004/shard.02693.mds
diff --git a/train/shard.02694.mds b/train/chunk_004/shard.02694.mds
similarity index 100%
rename from train/shard.02694.mds
rename to train/chunk_004/shard.02694.mds
diff --git a/train/shard.02695.mds b/train/chunk_004/shard.02695.mds
similarity index 100%
rename from train/shard.02695.mds
rename to train/chunk_004/shard.02695.mds
diff --git a/train/shard.02696.mds b/train/chunk_004/shard.02696.mds
similarity index 100%
rename from train/shard.02696.mds
rename to train/chunk_004/shard.02696.mds
diff --git a/train/shard.02697.mds b/train/chunk_004/shard.02697.mds
similarity index 100%
rename from train/shard.02697.mds
rename to train/chunk_004/shard.02697.mds
diff --git a/train/shard.02698.mds b/train/chunk_004/shard.02698.mds
similarity index 100%
rename from train/shard.02698.mds
rename to train/chunk_004/shard.02698.mds
diff --git a/train/shard.02699.mds b/train/chunk_004/shard.02699.mds
similarity index 100%
rename from train/shard.02699.mds
rename to train/chunk_004/shard.02699.mds
diff --git a/train/shard.02700.mds b/train/chunk_004/shard.02700.mds
similarity index 100%
rename from train/shard.02700.mds
rename to train/chunk_004/shard.02700.mds