bong[8], borg[8], grob[8], bond[7], bord[7], drob[7], born[7], dong[6], noor[6], dorn[5], nord[5],
bog[7], bon[6], bor[6], gon[5], gor[5], don[4], rod[4],
ob[5], go[4], do[3], od[3], on[3],
