niobu[9]
uboi[8], bonu[8], buno[8], boni[6], niob[6], unio[6]
bun[7], obu[7], bin[5], ibn[5], boi[5], obi[5], bon[5], ino[3], oni[3]
bu[6], bi[4], bo[4], nu[4], in[2], ni[2], no[2], on[2]
