a-a a-c aaa aac aam aao aap aar ac- aca acc acm aco acp acr ama amc amm amo amp amr aoa aoc aom aoo aop aor ap- apa apc apm apo app apr ar- ara arc arm aro arp arr c-- caa cac cam cao cap car cca ccc ccm cco ccp ccr cma cmc cmm cmo cmp cmr co- coa coc com coo cop cor cpa cpc cpm cpo cpp cpr cra crc crm cro crp crr m-o m-r maa mac mam mao map mar mc- mca mcc mcm mco mcp mcr mma mmc mmm mmo mmp mmr moa moc mom moo mop mor mpa mpc mpm mpo mpp mpr mra mrc mrm mro mrp mrr oaa oac oam oao oap oar oc- oca occ ocm oco ocp ocr om- oma omc omm omo omp omr oo- ooa ooc oom ooo oop oor op- opa opc opm opo opp opr or- ora orc orm oro orp orr p-p paa pac pam pao pap par pca pcc pcm pco pcp pcr pma pmc pmm pmo pmp pmr poa poc pom poo pop por ppa ppc ppm ppo ppp ppr pra prc prm pro prp prr ra- raa rac ram rao rap rar rca rcc rcm rco rcp rcr rma rmc rmm rmo rmp rmr roa roc rom roo rop ror rpa rpc rpm rpo rpp rpr rra rrc rrm rrp rrr