keku[8], kuki[8], koku[8], yuko[8], ukoi[7], keki[6], koki[6], okey[6],
kuk[7], kyu[7], oku[6], kek[5], kok[5], kei[4], kie[4], eko[4], kio[4], koi[4],
ku[5], ki[3], ko[3], ok[3], eo[2],
