bonu[8], buno[8], puno[7], bono[6], obon[6], opon[5], pono[5],
pub[8], bun[7], obu[7], pun[6], opu[6], bon[5], ono[3],
bu[6], bo[4], nu[4], op[3], po[3], no[2], on[2],
