bek[6], cek[5], dek[5], cep[5], ber[5], erb[5], reb[5], brr[5], cer[4], der[4], red[4], ker[4], rek[4], per[4], rep[4], drr[4], prr[4],
be[4], ce[3], de[3], pe[3], er[2], re[2],