abba[8], baba[8], babi[8], biba[8], basa[6], saab[6], bias[6], ibis[6],
bab[7], bib[7], bai[5], bas[5], bis[5], asa[3], ais[3], sia[3],
ba[4], bi[4], aa[2], ii[2], as[2], si[2],
