beka[7], kabe[7], bako[7], beko[7], kobo[7], obok[7], koka[6], koko[6],
bak[6], bek[6], bok[6], kek[5], abo[5], boa[5], oba[5], kok[5], oka[4], eko[4], oko[4],
ba[4], be[4], bo[4], ka[3], ko[3], ok[3], eo[2],
