a-a a-c aaa aac aak aam aao ac- aca acc ack acm aco aka akc akk akm ako ama amc amk amm amo aoa aoc aok aom aoo c-- caa cac cak cam cao cca ccc cck ccm cco cka ckc ckm cko cma cmc cmk cmm cmo co- coa coc cok com coo ka- kaa kac kak kam kao kca kcc kck kcm kkc kkk kkm kma kmc kmk kmm kmo koa koc kok kom koo m-o maa mac mak mam mao mc- mca mcc mck mcm mco mka mkc mkk mkm mko mma mmc mmk mmm mmo moa moc mok mom moo oaa oac oak oam oao oc- oca occ ock ocm oco oka okc okk oko om- oma omc omm omo oo- ooa ooc ook oom ooo