qidvt pidv oidvt2 nidvt midv
1rcv 0rcvt2 zrcvt yrcv xrcvt2
c1bvt2 b1bvt a1bv 90bvt2 80bvt
nabvt mabv labvt2 kabvt jabv
yjav xjavt2 wjavt vjav ujavt2