fok[8], efo[7], ref[7], for[7], orf[7], frr[7], eko[4], ker[4], rek[4], kor[4], kro[4], okr[4], ork[4], rok[4], ero[3],
ef[6], fe[6], eł[4], ko[3], ok[3], eo[2], er[2], re[2], or[2], ro[2],
