a-a a-b aaa aab aah aak aam aao aar aas ab- aba abb abh abk abm abo abr abs aha ahb ahh ahk ahm aho ahr ahs aka akb akh akk akm ako akr aks ama amb amh amk amm amo amr ams aoa aob aoh aok aom aoo aor aos ar- ara arb arh ark arm aro arr ars as- asa asb ash ask asm aso asr ass baa bab bah bak bam bao bar bas bba bbb bbh bbk bbm bbo bbr bbs bha bhb bhh bhk bhm bho bhr bhs bka bkb bkk bkm bko bkr bks bma bmb bmh bmk bmm bmo bmr bms boa bob boh bok bom boo bor bos bra brb brh brk brm bro brr brs bsa bsb bsh bsk bsm bso bsr bss haa hab hah hak ham hao har has hba hbb hbh hbk hbm hbo hbr hbs hha hhb hhh hhk hhm hho hhr hhs hka hkb hkh hkk hkm hko hkr hks hma hmb hmh hmk hmm hmo hmr hms hoa hob hoh hok hom hoo hor hos hr- hra hrb hrh hrk hrm hro hrr hrs hsa hsb hsh hsk hsm hsr hss ka- kaa kab kah kak kam kao kar kas kba kbb kbh kbk kbm kbo kbr kbs kha khh khk khm kho khr khs kkb kkh kkk kkm kkr kks kma kmb kmh kmk kmm kmo kms koa kob koh kok kom koo kor kos kra krk kro krr krs ksa ksb ksh ksk ksm kso ksr kss m-o m-r maa mab mah mak mam mao mar mas mba mbb mbh mbk mbm mbo mbr mbs mha mhh mhk mhm mho mhr mhs mka mkb mkh mkk mkm mko mkr mks mma mmb mmh mmk mmm mmo mmr mms moa mob moh mok mom moo mor mos mra mrb mrh mrk mrm mro mrr mrs msa msb msh msk msm mso msr mss oaa oab oah oak oam oao oar oas ob- oba obb obh obk obm obo obr obs oha ohh ohm oho ohr ohs oka okb okk oko okr oks om- oma omb omh omm omo omr oms oo- ooa oob ooh ook oom ooo oor oos or- ora orb orh ork orm oro orr ors os- osa osb osh osk osm oso osr oss ra- raa rab rah rak ram rao rar ras rba rbb rbh rbk rbm rbo rbr rbs rh- rha rhb rhh rhm rho rhr rhs rkb rkk rkm rko rks rma rmb rmh rmm rmo rmr rms roa rob roh rok rom roo ror ros rra rrb rrh rrk rrm rrr rrs rsa rsb rsh rsk rsm rso rsr rss saa sab sah sak sam sao sar sas sba sbb sbh sbk sbm sbo sbr sbs sh- sha shb shh shk shm sho shr shs sk- ska skb skh skk skm sko skr sks sma smb smh smk smm smo smr sms soa sob soh sok som soo sor sos sr- sra srb srh srk srm sro srr srs ss- ssa ssb ssh ssk ssm sso ssr sss