A.9 B.10 C.11 D.12
A.d,c,b,a B.c,a,b,d C.d,b,a,c D.d,a,b,c
A.2,4,6,8,10 B.8,6,10,2,4 C.8,10,6,4,2 D.10,8,6,4,2