a-a a-c aaa aac aam aao aap ac- aca acc acm aco acp ama amc amm amo amp aoa aoc aom aoo aop ap- apa apc apm apo app c-- caa cac cam cao cap cca ccc ccm cco ccp cma cmc cmm cmo cmp co- coa coc com coo cop cpa cpc cpm cpo cpp m-o maa mac mam mao map mc- mca mcc mcm mco mcp mma mmc mmm mmo mmp moa moc mom moo mop mpa mpc mpm mpo mpp oaa oac oam oao oap oc- oca occ ocm oco ocp om- oma omc omm omo omp oo- ooa ooc oom ooo oop op- opa opc opm opo opp p-p paa pac pam pao pap pca pcc pcm pco pcp pma pmc pmm pmo pmp poa poc pom poo pop ppa ppc ppm ppo ppp