open[5], peon[5], poen[5], neon[4], noez[4], ozen[4],
nep[4], pen[4], eon[3], one[3], non[3], zen[3], ezo[3], zon[3],
pe[3], op[3], po[3], ee[2], en[2], eo[2], no[2], on[2], ez[2], ze[2], oz[2],
