refu[10], druh[9], fere[8], free[8], erhu[8], rude[7],
huf[11], fru[9], fur[9], ruf[9], duh[8], fee[7], ref[7], edu[6], ued[6], dur[6], rud[6], urd[6], ehe[5], her[5], der[4], red[4],
fu[8], uf[8], ef[6], fe[6], hu[6], ud[5], eh[4], he[4], de[3], ee[2], er[2], re[2],
