a-a a-b a-z aaa aab aad aan aar aau aaz ab- aba abb abd abn abr abu abz ad- ada adb add adn adr adu adz an- ana anb and ann anr anu anz ar- ara arb ard arn arr aru arz au- aua aub aud aun aur auz az- aza azb azd azn azu azz b-u baa bab bad ban bar bau baz bba bbb bbd bbn bbr bbu bda bdb bdd bdr bdu bdz bna bnb bnd bnn bnr bnu bnz bra brb brd brn brr bru brz bua bub bud bun bur buu buz bza bzd bzn bzr bzu bzz daa dab dad dan dar dau daz dba dbb dbd dbn dbr dbu dbz dda ddb ddd ddn ddr ddu ddz dna dnb dnd dnn dnr dnz dra drb drd drn drr dru drz dua dub dud dun dur duz dza dzb dzd dzr dzu naa nab nad nan nar nau naz nba nbb nbd nbn nbr nbu nda ndb ndd ndn ndr ndu nna nnb nnn nnu nnz nra nrb nrd nrn nrr nru nrz nua nub nud nun nur nuu nzb nzd nzz ra- raa rab rad ran rar rau raz rba rbb rbd rbn rbr rbu rda rdb rdd rdn rdr rdu rna rnb rnd rnn rnr rnu rnz rra rrb rrd rrn rrr rru rua rub rud run rur ruu ruz rza rzb ua- uaa uab uad uan uar uau uaz uba ubb ubn ubr ubu uda udb udd udn udr udu un- una unb und unn unr unu ur- ura urb urd urn urr uru urz uua uun uur uuu uza uzb uzu zaa zab zad zan zar zaz zbb zbr znd znn zub zud zun zur zuz zzr zzz