a-a a-c aaa aac aaf aaj aak aao ac- aca acc acf acj ack aco af- afa afc aff afj afk afo aja ajc ajf ajj ajk ajo aka akc akj akk ako aoa aoc aof aoj aok aoo c-- c-j caa cac caf caj cak cao cca ccc ccf ccj cck cco cfa cfc cff cfk cfo cja cjc cjf cjk cka ckc cko co- coa coc cof coj cok coo faa fac faf faj fak fao fca fcc fcf fcj fck fco ffa ffc fff ffk ffo fja fjc fka fkc fkf fkj fkk foa foc fof fok foo jaa jac jaf jaj jak jao jca jcc jcf jck jco jfa jfc jff jfj jfk jfo jja jjc jjf jjj jjk jka jkk jko joa joc jof joj jok joo ka- kaa kac kaf kaj kak kao kca kcc kck kfa kfc kff kfo kjc kkc kkk koa koc kof kok koo oaa oac oaf oaj oak oao oc- oca occ ocf ocj ock oco of- ofa ofc off ofo oja ojc ojo oka okc okj okk oko oo- ooa ooc oof ook ooo