a-a a-b a-z aaa aab aan aar aas aau aay aaz ab- aba abb abn abr abs abu aby abz an- ana anb ann anr ans anu any anz ar- ara arb arn arr ars aru ary arz as- asa asb asn asr ass asu asy asz au- aua aub aun aur aus auz ay- aya ayn ayr ays ayu ayz az- aza azb azn azs azu azy azz b-u baa bab ban bar bas bau bay baz bba bbb bbn bbr bbs bbu bby bna bnb bnn bnr bns bnu bnz bra brb brn brr brs bru bry brz bsa bsb bsn bsr bss bsu bsy bua bub bun bur bus buu buy buz by- bya byn byr bys byu byz bza bzn bzr bzs bzu bzz naa nab nan nar nas nau nay naz nba nbb nbn nbr nbs nbu nna nnb nnn nns nnu nnz nra nrb nrn nrr nrs nru nry nrz nsa nsb nsn nsr nss nsu nsy nsz nua nub nun nur nus nuu nuy nya nyn nys nyu nyy nzb nzs nzz ra- raa rab ran rar ras rau ray raz rba rbb rbn rbr rbs rbu rna rnb rnn rnr rns rnu rny rnz rra rrb rrn rrr rrs rru rsa rsb rsn rsr rss rsu rua rub run rur rus ruu ruy ruz ry- rya ryn ryr rys ryu ryy ryz rza rzb rzy saa sab san sar sas sau say saz sba sbb sbn sbr sbs sbu sby sna snb snn snr sns snu sny sr- sra srb srn srr srs sry ss- ssa ssb ssn ssr sss ssu ssz sua sub sun sur sus suu suy suz sy- sya syb syn syr sys syu sza szr szu ua- uaa uab uan uar uas uau uay uaz uba ubb ubn ubr ubs ubu uby un- una unb unn unr uns unu uny ur- ura urb urn urr urs uru ury urz usa usb usn usr uss usu usz uua uun uur uus uuu uys uyu uza uzb uzu yaa yab yan yar yas yau yay yaz ybr ybs yby ybz yna ynn yns ynu yny yra yrn yrs yru ysa ysb ysr yss ysu ysy ysz yua yun yur yus yuu yuy yyb yys yyu yyy yyz yzb yzr yzu yzy zaa zab zan zar zas zay zaz zbb zbr zbs zby znn zns zrs zsa zsu zsz zub zun zur zus zuz zzr zzs zzy zzz