醫學ㄧ

C A D C D    C D B C D
A C A B C    D B D C A
C A B D B    A B B B C
B D B D A    D B A B A
D B D C D    B A C A B
A D A C A    B C A C B
A B A B A    D B C B A
B C A B C    B C B C A
C B A C B    A C D A B
A C D C B    C A D C A