bidy[8], dipy[7], diwy[6], widy[6],
dyb[7], bid[6], dip[5], idy[5], diw[4], wid[4], piw[4], iwy[4], iii[3], wii[3],
by[5], bi[4], id[3], pi[3], wy[3], ii[2], iw[2],
