boni[6], niob[6], brio[6], broi[6], robi[6], bron[6], birr[6], inro[4], iron[4], nori[4], orni[4], roni[4],
bin[5], ibn[5], boi[5], obi[5], bon[5], bor[5], rob[5], brr[5], ino[3], oni[3], inr[3], roi[3], nor[3],
bi[4], bo[4], in[2], ni[2], no[2], on[2], or[2], ro[2],
