a-a a-b aaa aab aak aao aap aar aas aav aay ab- aba abb abk abo abp abr abs abv aby aka akb akk ako akp akr aks akv aoa aob aok aoo aop aor aos aov ap- apa apb apk apo app apr aps apv apy ar- ara arb ark aro arp arr ars arv ary as- asa asb ask aso asp asr ass asv asy av- ava avb avk avo avp avr avs avy ay- aya ayk ayo ayp ayr ays b-p baa bab bak bao bap bar bas bav bay bba bbb bbk bbo bbp bbr bbs bby bka bkb bkk bko bkp bkr bks bkv boa bob bok boo bop bor bos bov boy bpa bpb bpo bpp bpr bps bpv bpy bra brb brk bro brp brr brs brv bry bsa bsb bsk bso bsp bsr bss bsv bsy bva bvb bvk bvo bvp bvr bvs bvv by- bya byk byo byp byr bys ka- kaa kab kak kao kap kar kas kav kay kba kbb kbk kbo kbp kbr kbs kkb kkk kkp kkr kks kkv kky koa kob kok koo kop kor kos koy kpa kpk kpo kpp kpr kps kpv kra krk kro krp krr krs krv kry ksa ksb ksk kso ksp ksr kss ksv kva kvb kvk kvo kvp kvr kvs kvv kya kyo kyp kyr kys oaa oab oak oao oap oar oas oav ob- oba obb obk obo obp obr obs obv oby oka okb okk oko okp okr oks oo- ooa oob ook ooo oop oor oos oov op- opa opb opk opo opp opr ops opv opy or- ora orb ork oro orp orr ors orv ory os- osa osb osk oso osp osr oss osv ov- ova ovb ovo ovp ovs ovv oya oyo oys p-p paa pab pak pao pap par pas pav pay pba pbb pbk pbo pbp pbr pbs pby pka pkb pko pkp pkr pks pky poa pob pok poo pop por pos pov poy ppa ppb ppk ppo ppp ppr pps ppv pra prb prk pro prp prr prs prv pry ps- psa psb psk pso psp psr pss psv psy pva pvb pvk pvo pvp pvr pvs pvv py- pya pyb pyk pyo pyr pys ra- raa rab rak rao rap rar ras rav ray rba rbb rbk rbo rbp rbr rbs rkb rkk rko rkp rks rkv rky roa rob rok roo rop ror ros rov roy rpa rpb rpk rpo rpp rpr rps rpv rra rrb rrk rrp rrr rrs rsa rsb rsk rso rsp rsr rss rsv rva rvb rvo rvp rvr rvs rvv rvy ry- rya ryk ryo ryr rys ryy saa sab sak sao sap sar sas sav say sba sbb sbk sbo sbp sbr sbs sbv sby sk- ska skb skk sko skp skr sks sky soa sob sok soo sop sor sos sov soy spa spb spk spo spp spr sps spv spy sr- sra srb srk sro srp srr srs srv sry ss- ssa ssb ssk sso ssp ssr sss ssv sva svb svk svo svp svr svs svv svy sy- sya syb syk syp syr sys v-a vaa vab vak vao vap var vas vav vay vba vbk vbo vbr vbs vbv vka vkb vkp voa vob vok voo vop vor vos vov voy vpa vpb vpk vpo vpp vpr vps vra vrb vrk vrp vrr vrs vry vsa vsb vsk vso vsp vsr vss vsv vva vvb vvo vvr vvs vvv vyp yaa yab yak yao yap yar yas yav yay ybp ybr ybs yby yka ykk yob yok yoo yop yor yos yoy ypa ypo yps yra yro yrp yrs ysa ysb ysk yso ysp ysr yss ysy yva yvo yvr yvy yyb yys yyy