a-a a-b aaa aab aah aam aao aar aas ab- aba abb abh abm abo abr abs aha ahb ahh ahm aho ahr ahs ama amb amh amm amo amr ams aoa aob aoh aom aoo aor aos ar- ara arb arh arm aro arr ars as- asa asb ash asm aso asr ass baa bab bah bam bao bar bas bba bbb bbh bbm bbo bbr bbs bha bhb bhh bhm bho bhr bhs bma bmb bmh bmm bmo bmr bms boa bob boh bom boo bor bos bra brb brh brm bro brr brs bsa bsb bsh bsm bso bsr bss haa hab hah ham hao har has hba hbb hbh hbm hbo hbr hbs hha hhb hhh hhm hho hhr hhs hma hmb hmh hmm hmo hmr hms hoa hob hoh hom hoo hor hos hr- hra hrb hrh hrm hro hrr hrs hsa hsb hsh hsm hsr hss m-o m-r maa mab mah mam mao mar mas mba mbb mbh mbm mbo mbr mbs mha mhh mhm mho mhr mhs mma mmb mmh mmm mmo mmr mms moa mob moh mom moo mor mos mra mrb mrh mrm mro mrr mrs msa msb msh msm mso msr mss oaa oab oah oam oao oar oas ob- oba obb obh obm obo obr obs oha ohh ohm oho ohr ohs om- oma omb omh omm omo omr oms oo- ooa oob ooh oom ooo oor oos or- ora orb orh orm oro orr ors os- osa osb osh osm oso osr oss ra- raa rab rah ram rao rar ras rba rbb rbh rbm rbo rbr rbs rh- rha rhb rhh rhm rho rhr rhs rma rmb rmh rmm rmo rmr rms roa rob roh rom roo ror ros rra rrb rrh rrm rrr rrs rsa rsb rsh rsm rso rsr rss saa sab sah sam sao sar sas sba sbb sbh sbm sbo sbr sbs sh- sha shb shh shm sho shr shs sma smb smh smm smo smr sms soa sob soh som soo sor sos sr- sra srb srh srm sro srr srs ss- ssa ssb ssh ssm sso ssr sss