mbir[7], bitw[7], mirt[6], mitr[6], widm[6], brwi[6], drwi[5],
bid[6], bim[6], bit[6], dim[5], dit[5], mit[5], mir[4], itr[4], tir[4], tri[4], diw[4], wid[4], wir[3],
bi[4], id[3], im[3], mi[3], iw[2],
