norii[5], ronin[5],
inii[4], inni[4], inio[4], inro[4], iron[4], nori[4], orni[4], roni[4], norn[4],
iii[3], ino[3], oni[3], non[3], inr[3], roi[3], nor[3],
ii[2], in[2], ni[2], no[2], on[2], or[2], ro[2],
