kerfe[11], pferd[11], feder[8], fedre[8], keder[8], erker[8], derer[5],
kefe[10], keep[10], kerf[10], peer[7], reep[7], erde[4], rede[4],
fee[6], per[6], rep[6], der[3], erd[3], red[3], ree[3],
er[2], re[2],
