berek[8], rebek[8], derek[7],
berd[7], debr[7], brek[7], rebe[6], kred[6], erek[5],
bek[6], bee[5], dek[5], ber[5], erb[5], reb[5], der[4], red[4], ker[4], rek[4],
be[4], de[3], ee[2], er[2], re[2],
