a-a a-c aaa aac aam aan aao aap ac- aca acc acm acn aco acp ama amc amm amn amo amp an- ana anc anm ann ano anp aoa aoc aom aon aoo aop ap- apa apc apm apn apo app c-- caa cac cam can cao cap cca ccc ccm ccn cco ccp cma cmc cmm cmn cmo cmp cn- cna cnc cnm cnn cno cnp co- coa coc com con coo cop cpa cpc cpm cpn cpo cpp m-o maa mac mam man mao map mc- mca mcc mcm mcn mco mcp mma mmc mmm mmn mmo mmp mna mnc mnm mnn mno mnp moa moc mom mon moo mop mpa mpc mpm mpn mpo mpp naa nac nam nan nao nap nca ncc ncm ncn nco ncp nma nmc nmm nmn nmo nmp nna nnc nnm nnn nno nnp no- noa noc nom non noo nop npa npc npm npn npo npp oaa oac oam oan oao oap oc- oca occ ocm ocn oco ocp om- oma omc omm omn omo omp on- ona onc onn ono onp oo- ooa ooc oom oon ooo oop op- opa opc opm opn opo opp p-p paa pac pam pan pao pap pca pcc pcm pcn pco pcp pma pmc pmm pmn pmo pmp pn- pna pnc pnm pnn pno pnp poa poc pom pon poo pop ppa ppc ppm ppn ppo ppp