beki[7], beko[7], boki[7], obie[6],
kiź[12], bek[6], bok[6], bee[5], boi[5], obi[5], kei[4], kie[4], eko[4], kio[4], koi[4],
be[4], bi[4], bo[4], ki[3], ko[3], ok[3], ee[2], eo[2],
