bobru[11],
bobu[10], bonu[8], buno[8], boru[8], buro[8], bron[6], runo[6], urno[6],
bub[9], bob[7], bun[7], obu[7], bru[7], bur[7], bon[5], bor[5], rob[5], nur[5], run[5], urn[5], oru[5], nor[3],
bu[6], bo[4], nu[4], no[2], on[2], or[2], ro[2],
