90bx18 a1bx b1bx1 c1bx18 d1bx

yrcx zrcx1 0rcx18 1rcx 2rcx1

nidx1 oidx18 pidx qidx1 ridx18

c9dx18 d9dx e9dx1 f9dx18 g9dx

1zex 2zex1 3zex18 4zex 5zex1