abba[8], baba[8], babi[8], biba[8], bada[7], bida[7], pada[6],
bab[7], bib[7], bad[6], dba[6], bid[6], bai[5], pad[5], dip[5], pai[4], pia[4],
ba[4], bi[4], ad[3], da[3], id[3], pa[3], pi[3], aa[2],
