feber[10], ferne[8], ebern[7], ebner[7], erben[7], reben[7],
feen[7], fern[7], bene[6], eben[6], ebne[6], eber[6], erbe[6], rebe[6], eren[4], neer[4], rene[4],
fee[6], erb[5], nee[3], ree[3], ern[3], ren[3],
ne[2], er[2], re[2],
