a-a a-b a-q a-z aaa aab aad aan aaq aaz ab- aba abb abd abn abq abz ad- ada adb add adn adq adz an- ana anb and ann anq anz aqa aqn az- aza azb azd azn azq azz baa bab bad ban baq baz bba bbb bbd bbn bbq bda bdb bdd bdq bdz bna bnb bnd bnn bnz bqd bza bzd bzn bzz daa dab dad dan daq daz dba dbb dbd dbn dbq dbz dda ddb ddd ddn ddq ddz dna dnb dnd dnn dnq dnz dqa dqn dza dzb dzd naa nab nad nan naz nba nbb nbd nbn nda ndb ndd ndn nna nnb nnn nnz nzb nzd nzz qaa qad qan qaz qba qbd qbq qda qdb qnb qnd qqq zaa zab zad zan zaq zaz zbb znd znn zzz