ceno[5], noce[5], ocen[5], cezo[5], neon[4], noez[4], ozen[4],
cen[4], cne[4], noc[4], cez[4], cze[4], eon[3], one[3], non[3], zen[3], ezo[3], zon[3],
ce[3], co[3], en[2], eo[2], no[2], on[2], ez[2], ze[2], oz[2],
