bici[7], bitw[7], pici[6], tipi[6], trip[6], brwi[6], wici[5], wcir[5],
bit[6], cip[5], pic[5], pit[5], itr[4], tir[4], tri[4], wic[4], piw[4], wii[3], wir[3],
bi[4], ci[3], pi[3], ii[2], iw[2],
