a-a a-c aaa aac aam aao aap aar aas ac- aca acc acm aco acp acr acs ama amc amm amo amp amr ams aoa aoc aom aoo aop aor aos ap- apa apc apm apo app apr aps ar- ara arc arm aro arp arr ars as- asa asc asm aso asp asr ass c-- caa cac cam cao cap car cas cca ccc ccm cco ccp ccr ccs cma cmc cmm cmo cmp cmr cms co- coa coc com coo cop cor cos cpa cpc cpm cpo cpp cpr cps cra crc crm cro crp crr crs csa csc csm cso csp csr css m-o m-r maa mac mam mao map mar mas mc- mca mcc mcm mco mcp mcr mcs mma mmc mmm mmo mmp mmr mms moa moc mom moo mop mor mos mpa mpc mpm mpo mpp mpr mps mra mrc mrm mro mrp mrr mrs msa msc msm mso msp msr mss oaa oac oam oao oap oar oas oc- oca occ ocm oco ocp ocr ocs om- oma omc omm omo omp omr oms oo- ooa ooc oom ooo oop oor oos op- opa opc opm opo opp opr ops or- ora orc orm oro orp orr ors os- osa osc osm oso osp osr oss p-p paa pac pam pao pap par pas pca pcc pcm pco pcp pcr pcs pma pmc pmm pmo pmp pmr pms poa poc pom poo pop por pos ppa ppc ppm ppo ppp ppr pps pra prc prm pro prp prr prs ps- psa psc psm pso psp psr pss ra- raa rac ram rao rap rar ras rca rcc rcm rco rcp rcr rcs rma rmc rmm rmo rmp rmr rms roa roc rom roo rop ror ros rpa rpc rpm rpo rpp rpr rps rra rrc rrm rrp rrr rrs rsa rsc rsm rso rsp rsr rss saa sac sam sao sap sar sas sca scc scm sco scp scr scs sma smc smm smo smp smr sms soa soc som soo sop sor sos spa spc spm spo spp spr sps sr- sra src srm sro srp srr srs ss- ssa ssc ssm sso ssp ssr sss