bici[7], irch[7], brwi[6], wici[5], wcir[5], drwi[5],
bid[6], chi[6], ich[6], hiw[5], wic[4], diw[4], wid[4], wii[3], wir[3],
bi[4], hi[4], ci[3], id[3], ii[2], iw[2],
