a-a a-c aaa aac aam aan aao aar ac- aca acc acm acn aco acr ama amc amm amn amo amr an- ana anc anm ann ano anr aoa aoc aom aon aoo aor ar- ara arc arm arn aro arr c-- caa cac cam can cao car cca ccc ccm ccn cco ccr cma cmc cmm cmn cmo cmr cn- cna cnc cnm cnn cno cnr co- coa coc com con coo cor cra crc crm crn cro crr m-o m-r maa mac mam man mao mar mc- mca mcc mcm mcn mco mcr mma mmc mmm mmn mmo mmr mna mnc mnm mnn mno mnr moa moc mom mon moo mor mra mrc mrm mrn mro mrr naa nac nam nan nao nar nca ncc ncm ncn nco ncr nma nmc nmm nmn nmo nmr nna nnc nnm nnn nno no- noa noc nom non noo nor nra nrc nrm nrn nro nrr oaa oac oam oan oao oar oc- oca occ ocm ocn oco ocr om- oma omc omm omn omo omr on- ona onc onn ono onr oo- ooa ooc oom oon ooo oor or- ora orc orm orn oro orr ra- raa rac ram ran rao rar rca rcc rcm rcn rco rcr rma rmc rmm rmn rmo rmr rna rnc rnm rnn rno rnr roa roc rom ron roo ror rra rrc rrm rrn rrr