abobra[10],
babra[9], rabab[9], abobr[9], bobra[9], baora[7], robra[7],
abba[8], baba[8], abbo[8], babo[8], boba[8], obab[8], arab[6], arba[6], bara[6], raba[6], arbo[6], baor[6], bora[6], roba[6],
bab[7], bob[7], abo[5], boa[5], oba[5], arb[5], bar[5], rab[5], bor[5], rob[5], brr[5], ara[3], aro[3], ora[3],
ba[4], bo[4], aa[2], ar[2], or[2], ro[2],
