a-a a-b a-i aaa aab aai aak aao aap aar aas aay ab- aba abb abi abk abo abp abr abs aby ai- aia aib aii aik aio aip air ais aiy aka akb aki akk ako akp akr aks aoa aob aoi aok aoo aop aor aos ap- apa apb api apk apo app apr aps apy ar- ara arb ari ark aro arp arr ars ary as- asa asb asi ask aso asp asr ass asy ay- aya ayi ayk ayo ayp ayr ays b-p baa bab bai bak bao bap bar bas bay bba bbb bbi bbk bbo bbp bbr bbs bby bi- bia bib bii bik bio bip bir bis biy bka bkb bkk bko bkp bkr bks boa bob boi bok boo bop bor bos boy bpa bpb bpi bpo bpp bpr bps bpy bra brb bri brk bro brp brr brs bry bsa bsb bsi bsk bso bsp bsr bss bsy by- bya byi byk byo byp byr bys ia- iaa iab iai iao iap iar ias iba ibb ibi ibk ibo ibp ibr ibs iby iia iib iii iio iip iir iis ika ikb iki ikk iko ikr iks io- ioa iob ioi ioo iop ior ios ipa ipb ipi ipo ipp ipr ips ipy ir- ira irb iri irk iro irp irr irs iry is- isa isb isi isk iso isp isr iss isy iya iyo iyr iys iyy ka- kaa kab kai kak kao kap kar kas kay kba kbb kbi kbk kbo kbp kbr kbs kia kib kii kik kio kip kir kis kkb kki kkk kkp kkr kks kky koa kob koi kok koo kop kor kos koy kpa kpi kpk kpo kpp kpr kps kra kri krk kro krp krr krs kry ksa ksb ksi ksk kso ksp ksr kss kya kyo kyp kyr kys o-i oaa oab oai oak oao oap oar oas ob- oba obb obi obk obo obp obr obs oby oia oib oii oik oio oip oir ois oka okb oki okk oko okp okr oks oo- ooa oob ooi ook ooo oop oor oos op- opa opb opi opk opo opp opr ops opy or- ora orb ori ork oro orp orr ors ory os- osa osb osi osk oso osp osr oss oya oyi oyo oys p-p paa pab pai pak pao pap par pas pay pba pbb pbi pbk pbo pbp pbr pbs pby pia pib pii pik pio pip pir pis pka pkb pki pko pkp pkr pks pky poa pob poi pok poo pop por pos poy ppa ppb ppi ppk ppo ppp ppr pps pra prb pri prk pro prp prr prs pry ps- psa psb psi psk pso psp psr pss psy py- pya pyb pyk pyo pyr pys ra- raa rab rai rak rao rap rar ras ray rba rbb rbi rbk rbo rbp rbr rbs ria rib rii rik rio rip rir ris riy rkb rkk rko rkp rks rky roa rob roi rok roo rop ror ros roy rpa rpb rpi rpk rpo rpp rpr rps rra rrb rri rrk rrp rrr rrs rsa rsb rsi rsk rso rsp rsr rss ry- rya ryk ryo ryr rys ryy saa sab sai sak sao sap sar sas say sba sbb sbi sbk sbo sbp sbr sbs sby sia sib sii sik sio sip sir sis sk- ska skb ski skk sko skp skr sks sky soa sob soi sok soo sop sor sos soy spa spb spi spk spo spp spr sps spy sr- sra srb sri srk sro srp srr srs sry ss- ssa ssb ssi ssk sso ssp ssr sss sy- sya syb syi syk syp syr sys yaa yab yai yak yao yap yar yas yay ybi ybp ybr ybs yby yii yio yip yir yis yka yki ykk yob yoi yok yoo yop yor yos yoy ypa ypo yps yra yro yrp yrs ysa ysb ysi ysk yso ysp ysr yss ysy yyb yys yyy