ceno[5], noce[5], ocen[5], scen[5], neon[4], nono[4],
cen[4], cne[4], noc[4], ces[4], soc[4], eon[3], one[3], non[3], ono[3], sen[3], nos[3], son[3], oso[3],
ce[3], co[3], en[2], eo[2], no[2], on[2], es[2], se[2], os[2],
