refu[10], fezu[10], fere[8], free[8], frez[8], zeru[6], erze[4],
fru[9], fur[9], ruf[9], fee[7], ref[7], fez[7], zer[3],
fu[8], uf[8], ef[6], fe[6], ee[2], er[2], re[2], ez[2], ze[2],
