lern[5], ulen[5], lure[5], reun[4], rune[4], uren[4], urne[4],
leu[4], ern[3], ren[3], neu[3], reu[3], ure[3], nur[3], run[3],
ul[3], ne[2], er[2], re[2], nu[2], ur[2],
