ruder[8], dresu[8], duser[8], sersu[7],
rude[7], durr[7], desu[7], ruse[6], sure[6], dres[5], sers[4],
edu[6], ued[6], dur[6], rud[6], urd[6], rur[5], esu[5], rus[5], sur[5], sus[5], der[4], red[4], drr[4], des[4], ser[3],
ud[5], su[4], de[3], er[2], re[2], es[2], se[2],
