byk[7], bok[6], boy[6], oby[6], kpy[6], pyk[6], boi[5], obi[5], kip[5], kpi[5], pik[5], kop[5], opy[5], kio[4], koi[4], poi[4],
by[5], bi[4], bo[4], ki[3], ko[3], ok[3], pi[3], op[3], po[3],
