rumen urmen rmuen mruen umren muren ruemn uremn reumn erumn uermn eurmn rmeun mreun remun ermun merun emrun umern muern uemrn eumrn meurn emurn rumne urmne rmune mrune umrne murne runme urnme rnume nrume unrme nurme rmnue mrnue rnmue nrmue mnrue nmrue umnre munre unmre numre mnure nmure ruenm urenm reunm erunm uernm eurnm runem urnem rnuem nruem unrem nurem renum ernum rneum nreum enrum nerum uenrm eunrm unerm nuerm enurm neurm rmenu mrenu remnu ermnu mernu emrnu rmneu mrneu rnmeu nrmeu mnreu nmreu renmu ernmu rnemu nremu enrmu nermu menru emnru mneru nmeru enmru nemru umenr muenr uemnr eumnr meunr emunr umner muner unmer numer mnuer nmuer uenmr eunmr unemr nuemr enumr neumr menur emnur mneur nmeur enmur nemur
Note: these 'words' (valid or invalid) are all the permutations of the word rumen. These words are obtained by scrambling the letters in rumen.