a-a a-c aaa aac aad aak aam aao ac- aca acc acd ack acm aco ad- ada adc add adk adm ado aka akc akd akk akm ako ama amc amd amk amm amo aoa aoc aod aok aom aoo c-- caa cac cad cak cam cao cca ccc ccd cck ccm cco cda cdc cdd cdk cdm cdo cka ckc ckd ckm cko cma cmc cmd cmk cmm cmo co- coa coc cod cok com coo daa dac dad dak dam dao dca dcc dcd dck dcm dco dda ddc ddd ddk ddm ddo dka dkc dkk dkm dko dma dmc dmd dmk dmm dmo doa doc dod dok dom doo ka- kaa kac kad kak kam kao kca kcc kcd kck kcm kda kdc kdk kdm kdo kkc kkk kkm kma kmc kmd kmk kmm kmo koa koc kod kok kom koo m-o maa mac mad mak mam mao mc- mca mcc mcd mck mcm mco mda mdc mdd mdk mdm mdo mka mkc mkd mkk mkm mko mma mmc mmd mmk mmm mmo moa moc mod mok mom moo oaa oac oad oak oam oao oc- oca occ ocd ock ocm oco oda odc odd odm odo oka okc okd okk oko om- oma omc omd omm omo oo- ooa ooc ood ook oom ooo