acan[5], cena[5], ceno[5], noce[5], ocen[5], anoa[4], eona[4],
cna[4], cen[4], cne[4], noc[4], ana[3], ano[3], ona[3], eon[3], one[3],
ce[3], co[3], aa[2], ee[2], na[2], en[2], eo[2], no[2], on[2],
