a-a a-c aaa aac aak aam aao aar aas ac- aca acc ack acm aco acr acs aka akc akk akm ako akr aks ama amc amk amm amo amr ams aoa aoc aok aom aoo aor aos ar- ara arc ark arm aro arr ars as- asa asc ask asm aso asr ass c-- caa cac cak cam cao car cas cca ccc cck ccm cco ccr ccs cka ckc ckm cko cks cma cmc cmk cmm cmo cmr cms co- coa coc cok com coo cor cos cra crc crk crm cro crr crs csa csc csk csm cso csr css ka- kaa kac kak kam kao kar kas kca kcc kck kcm kcr kcs kkc kkk kkm kkr kks kma kmc kmk kmm kmo kms koa koc kok kom koo kor kos kra krc krk kro krr krs ksa ksc ksk ksm kso ksr kss m-o m-r maa mac mak mam mao mar mas mc- mca mcc mck mcm mco mcr mcs mka mkc mkk mkm mko mkr mks mma mmc mmk mmm mmo mmr mms moa moc mok mom moo mor mos mra mrc mrk mrm mro mrr mrs msa msc msk msm mso msr mss oaa oac oak oam oao oar oas oc- oca occ ock ocm oco ocr ocs oka okc okk oko okr oks om- oma omc omm omo omr oms oo- ooa ooc ook oom ooo oor oos or- ora orc ork orm oro orr ors os- osa osc osk osm oso osr oss ra- raa rac rak ram rao rar ras rca rcc rcm rco rcr rcs rkc rkk rkm rko rks rma rmc rmm rmo rmr rms roa roc rok rom roo ror ros rra rrc rrk rrm rrr rrs rsa rsc rsk rsm rso rsr rss saa sac sak sam sao sar sas sca scc sck scm sco scr scs sk- ska skc skk skm sko skr sks sma smc smk smm smo smr sms soa soc sok som soo sor sos sr- sra src srk srm sro srr srs ss- ssa ssc ssk ssm sso ssr sss