fern[7], freu[7], rufe[7], ufer[7], ufre[7], reun[4], rune[4], uren[4], urne[4],
fun[6], ruf[6], ern[3], ren[3], neu[3], reu[3], ure[3], nur[3], run[3],
ne[2], er[2], re[2], nu[2], ur[2],
