feber[10], ferse[8], beere[7], ebers[7], erbes[7], erbse[7], serbe[7],
fese[7], eber[6], erbe[6], rebe[6],
fee[6], fes[6], erb[5], ree[3], see[3], ers[3], res[3],
er[2], re[2], es[2],
