core[8], cour[8], cure[7], euro[5], roue[5], reun[4], rune[4], uren[4], urne[4],
cer[6], ern[3], ren[3], neu[3], reu[3], ure[3], nur[3], run[3],
on[3], ne[2], er[2], re[2], nu[2], ur[2],
