a-a a-b aaa aab aan aao aar aas aau aay ab- aba abb abn abo abr abs abu aby an- ana anb ann ano anr ans anu any aoa aob aon aoo aor aos aou ar- ara arb arn aro arr ars aru ary as- asa asb asn aso asr ass asu asy au- aua aub aun auo aur aus ay- aya ayn ayo ayr ays ayu b-u baa bab ban bao bar bas bau bay bba bbb bbn bbo bbr bbs bbu bby bna bnb bnn bno bnr bns bnu boa bob bon boo bor bos bou boy bra brb brn bro brr brs bru bry bsa bsb bsn bso bsr bss bsu bsy bua bub bun buo bur bus buu buy by- bya byn byo byr bys byu naa nab nan nao nar nas nau nay nba nbb nbn nbo nbr nbs nbu nna nnb nnn nno nns nnu no- noa nob non noo nor nos nou noy nra nrb nrn nro nrr nrs nru nry nsa nsb nsn nso nsr nss nsu nsy nua nub nun nuo nur nus nuu nuy nya nyn nyo nys nyu nyy oaa oab oan oao oar oas oau ob- oba obb obn obo obr obs obu oby on- ona onb onn ono onr ons onu ony oo- ooa oob oon ooo oor oos or- ora orb orn oro orr ors oru ory os- osa osb osn oso osr oss osu ou- oua oun ouo our ous oya oyo oys ra- raa rab ran rao rar ras rau ray rba rbb rbn rbo rbr rbs rbu rna rnb rnn rno rnr rns rnu rny roa rob ron roo ror ros rou roy rra rrb rrn rrr rrs rru rsa rsb rsn rso rsr rss rsu rua rub run ruo rur rus ruu ruy ry- rya ryn ryo ryr rys ryu ryy saa sab san sao sar sas sau say sba sbb sbn sbo sbr sbs sbu sby sna snb snn sno snr sns snu sny soa sob son soo sor sos sou soy sr- sra srb srn sro srr srs sry ss- ssa ssb ssn sso ssr sss ssu sua sub sun suo sur sus suu suy sy- sya syb syn syr sys syu ua- uaa uab uan uao uar uas uau uay uba ubb ubn ubo ubr ubs ubu uby un- una unb unn uno unr uns unu uny uoa uob uon uoo uor uos ur- ura urb urn uro urr urs uru ury usa usb usn uso usr uss usu uua uun uur uus uuu uyo uys uyu yaa yab yan yao yar yas yau yay ybr ybs yby yna ynn yns ynu yny yob yon yoo yor yos you yoy yra yrn yro yrs yru ysa ysb yso ysr yss ysu ysy yua yun yuo yur yus yuu yuy yyb yys yyu yyy