abba[8], baba[8], brah[8], bada[7], bard[7], drab[7], arab[6], arba[6], bara[6], raba[6], rada[5],
bab[7], bad[6], dba[6], aha[5], arb[5], bar[5], rab[5], dar[4], rad[4], ara[3],
ba[4], ha[4], ad[3], da[3], aa[2], ar[2],