sfen[8], neon[4],
fen[7], nef[7], efo[7], fon[7], fes[7], fos[7], sof[7], eon[3], one[3], non[3], sen[3], nos[3], son[3],
ef[6], fe[6], en[2], eo[2], no[2], on[2], es[2], se[2], os[2],
