bied[7], bido[7], obie[6], idei[5], ideo[5],
bid[6], bod[6], boi[5], obi[5], deo[4], ode[4], doi[4], ido[4], iii[3],
be[4], bi[4], bo[4], de[3], id[3], do[3], od[3], ii[2], eo[2],
