tst18 sst1 rst18i qst18 pst1
41s1 31s18i 21s18 11s1 01s18i
fbs18i ebs18 dbs1 cbs18i bbs18
qkr18 pkr1 okr18i nkr18 mkr1
1tq1 0tq18i ztq18 ytq1 xtq18i