beerd[7], bered[7], derbe[7], ererb[7], derer[5],
bede[6], derb[6], eber[6], erbe[6], rebe[6], erde[4], rede[4],
cer[6], erb[5], brr[5], der[3], erd[3], red[3], ree[3],
er[2], re[2],
