(A)
- Stack with orange block
- Stack with purple block, green block, from bottom to top
- Stack with blue block, yellow block, from bottom to top

(B)
- Stack with yellow block
- Stack with orange block
- Stack with green block
- Stack with purple block

(C)
- Stack with green block, purple block, blue block, red block, orange block, from bottom to top

(D)
- Stack with green block, yellow block, from bottom to top
- Stack with purple block, orange block, from bottom to top