feder[8], fedre[8], recte[8], derer[5], erdet[5], redet[5],
feet[7], fete[7], erde[4], rede[4], reet[4], teer[4],
fee[6], cer[6], der[3], erd[3], red[3], ree[3], tee[3],
er[2], re[2], et[2],
