a-a a-b a-q a-z aaa aab aad aaq aau aaz ab- aba abb abd abq abu abz ad- ada adb add adq adu adz aqa au- aua aub aud auz az- aza azb azd azq azu azz b-u baa bab bad baq bau baz bba bbb bbd bbq bbu bda bdb bdd bdq bdu bdz bqd bua bub bud buu buz bza bzd bzu bzz daa dab dad daq dau daz dba dbb dbd dbq dbu dbz dda ddb ddd ddq ddu ddz dqa dua dub dud duz dza dzb dzd dzu qaa qad qau qaz qba qbd qbq qda qdb qqq qqu qu- qua qud ua- uaa uab uad uaq uau uaz uba ubb ubu uda udb udd udu uua uuu uza uzb uzu zaa zab zad zaq zaz zbb zub zud zuz zzz