koce[6], ceno[5], noce[5], ocen[5],
cek[5], koc[5], cen[4], cne[4], eko[4], noc[4], nok[4], eon[3], one[3],
ce[3], co[3], ko[3], ok[3], ee[2], en[2], eo[2], no[2], on[2],
