a-a a-c a-z aaa aac aam aao aar aas aaz ac- aca acc acm aco acr acs acz ama amc amm amo amr ams amz aoa aoc aom aoo aor aos ar- ara arc arm aro arr ars arz as- asa asc asm aso asr ass asz az- aza azm azo azs azz c-- caa cac cam cao car cas caz cca ccc ccm cco ccr ccs ccz cma cmc cmm cmo cmr cms co- coa coc com coo cor cos coz cra crc crm cro crr crs crz csa csc csm cso csr css csz cz- czc czm czo m-o m-r maa mac mam mao mar mas maz mc- mca mcc mcm mco mcr mcs mcz mma mmc mmm mmo mmr mms mmz moa moc mom moo mor mos moz mra mrc mrm mro mrr mrs mrz msa msc msm mso msr mss mza mzm oaa oac oam oao oar oas oc- oca occ ocm oco ocr ocs ocz om- oma omc omm omo omr oms omz oo- ooa ooc oom ooo oor oos or- ora orc orm oro orr ors orz os- osa osc osm oso osr oss oza ozm ozo ozs ozz ra- raa rac ram rao rar ras raz rca rcc rcm rco rcr rcs rma rmc rmm rmo rmr rms roa roc rom roo ror ros roz rra rrc rrm rrr rrs rsa rsc rsm rso rsr rss rza rzm rzo saa sac sam sao sar sas saz sca scc scm sco scr scs sma smc smm smo smr sms smz soa soc som soo sor sos soz sr- sra src srm sro srr srs ss- ssa ssc ssm sso ssr sss ssz sza szr zaa zac zam zao zar zas zaz zco zcs zma zmc zmm zms zo- zoa zoc zom zoo zor zos zro zrs zsa zsm zsz zzr zzs zzz