abba[8], baba[8], bada[7], band[7], bana[6], dana[5], nada[5],
bab[7], bad[6], dba[6], aha[5], ban[5], han[5], dan[4], dna[4], nad[4], ana[3],
ba[4], ha[4], ad[3], da[3], aa[2], na[2],
