abbo[8], babo[8], boba[8], obab[8], 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], aro[3], ora[3],
ba[4], bo[4], ar[2], or[2], ro[2],
