a-a aaa aak aam aao aar aka akk akm ako akr ama amk amm amo amr aoa aok aom aoo aor ar- ara ark arm aro arr ka- kaa kak kam kao kar kkk kkm kkr kma kmk kmm kmo koa kok kom koo kor kra krk kro krr m-o m-r maa mak mam mao mar mka mkk mkm mko mkr mma mmk mmm mmo mmr moa mok mom moo mor mra mrk mrm mro mrr oaa oak oam oao oar oka okk oko okr om- oma omm omo omr oo- ooa ook oom ooo oor or- ora ork orm oro orr ra- raa rak ram rao rar rkk rkm rko rma rmm rmo rmr roa rok rom roo ror rra rrk rrm rrr