ureid[8],
duru[9], urdu[9], rude[7], dier[5],
udu[8], edu[6], ued[6], idu[6], dur[6], rud[6], urd[6], rui[5], der[4], red[4], rei[3],
uu[6], ud[5], de[3], id[3], er[2], re[2],
