renu[6], uren[6], ruse[6], sure[6], eser[4],
nur[5], run[5], urn[5], esu[5], snu[5], rus[5], sur[5], ner[3], ren[3], sen[3], ser[3],
nu[4], su[4], ee[2], en[2], er[2], re[2], es[2], se[2],
