beko[7], kobo[7], obok[7], kobz[7], koko[6], bezo[6], kozo[5],
bek[6], bok[6], kek[5], kok[5], bez[5], eko[4], oko[4], zek[4], ezo[3], zoo[3],
be[4], bo[4], ko[3], ok[3], eo[2], ez[2], ze[2], oz[2],
