cure[7], drud[4], deut[4], reut[4], rute[4], treu[4],
cer[6], duc[6], cut[6], der[3], erd[3], red[3], dur[3], reu[3], ure[3], tue[3],
er[2], re[2], et[2], du[2], ud[2], ur[2], tu[2],
