kokon[7], konne[6], konno[6],
koko[6], okno[5], neon[4], nono[4],
kek[5], kok[5], eko[4], nok[4], oko[4], eon[3], one[3], non[3], ono[3],
ko[3], ok[3], ee[2], en[2], eo[2], no[2], on[2],
