beko[7], kobo[7], obok[7], kweb[7], webo[6], weko[5], woko[5],
bek[6], bok[6], web[5], eko[4], oko[4], wek[4], kwo[4], wok[4], ewo[3], owe[3], owo[3], wow[3],
be[4], bo[4], ko[3], ok[3], eo[2], ew[2], we[2],
