a-a a-b aaa aab aak aan aao aar aas aau aay ab- aba abb abk abn abo abr abs abu aby aka akb akk akn ako akr aks aku an- ana anb ank ann ano anr ans anu any aoa aob aok aon aoo aor aos aou ar- ara arb ark arn aro arr ars aru ary as- asa asb ask asn aso asr ass asu asy au- aua aub auk aun auo aur aus ay- aya ayk ayn ayo ayr ays ayu b-u baa bab bak ban bao bar bas bau bay bba bbb bbk bbn bbo bbr bbs bbu bby bka bkb bkk bkn bko bkr bks bna bnb bnk bnn bno bnr bns bnu boa bob bok bon boo bor bos bou boy bra brb brk brn bro brr brs bru bry bsa bsb bsk bsn bso bsr bss bsu bsy bua bub buk bun buo bur bus buu buy by- bya byk byn byo byr bys byu ka- kaa kab kak kan kao kar kas kau kay kba kbb kbk kbn kbo kbr kbs kbu kkb kkk kkn kkr kks kku kky kn- kna knk knn kno knr knu koa kob kok kon koo kor kos kou koy kra krk krn kro krr krs kru kry ksa ksb ksk ksn kso ksr kss ksu kub kuk kun kur kus kuu kuy kya kyn kyo kyr kys kyu naa nab nak nan nao nar nas nau nay nba nbb nbk nbn nbo nbr nbs nbu nka nkk nkn nko nkr nks nku nky nna nnb nnk nnn nno nns nnu no- noa nob nok non noo nor nos nou noy nra nrb nrk nrn nro nrr nrs nru nry nsa nsb nsk nsn nso nsr nss nsu nsy nua nub nuk nun nuo nur nus nuu nuy nya nyk nyn nyo nys nyu nyy oaa oab oak oan oao oar oas oau ob- oba obb obk obn obo obr obs obu oby oka okb okk oko okr oks oku on- ona onb onk onn ono onr ons onu ony oo- ooa oob ook oon ooo oor oos or- ora orb ork orn oro orr ors oru ory os- osa osb osk osn oso osr oss osu ou- oua ouk oun ouo our ous oya oyo oys ra- raa rab rak ran rao rar ras rau ray rba rbb rbk rbn rbo rbr rbs rbu rkb rkk rko rks rku rky rna rnb rnn rno rnr rns rnu rny roa rob rok ron roo ror ros rou roy rra rrb rrk rrn rrr rrs rru rsa rsb rsk rsn rso rsr rss rsu rua rub ruk run ruo rur rus ruu ruy ry- rya ryk ryn ryo ryr rys ryu ryy saa sab sak san sao sar sas sau say sba sbb sbk sbn sbo sbr sbs sbu sby sk- ska skb skk sko skr sks sku sky sna snb snk snn sno snr sns snu sny soa sob sok son soo sor sos sou soy sr- sra srb srk srn sro srr srs sry ss- ssa ssb ssk ssn sso ssr sss ssu sua sub suk sun suo sur sus suu suy sy- sya syb syk syn syr sys syu ua- uaa uab uak uan uao uar uas uau uay uba ubb ubk ubn ubo ubr ubs ubu uby uka ukb ukk ukn ukr uku un- una unb unk unn uno unr uns unu uny uoa uob uok uon uoo uor uos ur- ura urb urk urn uro urr urs uru ury usa usb usk usn uso usr uss usu uua uun uur uus uuu uyo uys uyu yaa yab yak yan yao yar yas yau yay ybr ybs yby yka ykk ykn yna ynk ynn yns ynu yny yob yok yon yoo yor yos you yoy yra yrn yro yrs yru ysa ysb ysk yso ysr yss ysu ysy yua yuk yun yuo yur yus yuu yuy yyb yys yyu yyy