bidy[8], bici[7], bisy[7], ibis[6], cisy[6], syci[6], disy[6], cisi[5], idis[5],
dyb[7], bid[6], bis[5], cyi[5], idy[5], cis[4], sic[4], dis[4],
by[5], bi[4], ci[3], id[3], ii[2], si[2],
