bek[6], bet[6], cek[5], dek[5], cep[5], ber[5], erb[5], reb[5], edt[5], ket[5], tek[5], pet[5], cer[4], der[4], red[4], ker[4], rek[4], per[4], rep[4], ret[4], ter[4],
be[4], ce[3], de[3], pe[3], et[3], te[3], er[2], re[2],