inio[4], inro[4], iron[4], nori[4], orni[4], roni[4], insi[4], sini[4], nosi[4], osin[4], sino[4], rosi[4],
ino[3], oni[3], inr[3], roi[3], nor[3], osi[3], sio[3], soi[3], nos[3], son[3], sir[3], ros[3],
ii[2], in[2], ni[2], no[2], on[2], or[2], ro[2], si[2], os[2],
