murls umrls mruls rmuls urmls rumls mulrs umlrs mlurs lmurs ulmrs lumrs mrlus rmlus mlrus lmrus rlmus lrmus urlms rulms ulrms lurms rlums lrums mursl umrsl mrusl rmusl urmsl rumsl musrl umsrl msurl smurl usmrl sumrl mrsul rmsul msrul smrul rsmul srmul ursml rusml usrml surml rsuml sruml mulsr umlsr mlusr lmusr ulmsr lumsr muslr umslr msulr smulr usmlr sumlr mlsur lmsur mslur smlur lsmur slmur ulsmr lusmr uslmr sulmr lsumr slumr mrlsu rmlsu mlrsu lmrsu rlmsu lrmsu mrslu rmslu msrlu smrlu rsmlu srmlu mlsru lmsru mslru smlru lsmru slmru rlsmu lrsmu rslmu srlmu lsrmu slrmu urlsm rulsm ulrsm lursm rlusm lrusm urslm ruslm usrlm surlm rsulm srulm ulsrm lusrm uslrm sulrm lsurm slurm rlsum lrsum rslum srlum lsrum slrum
Note: these 'words' (valid or invalid) are all the permutations of the word murls. These words are obtained by scrambling the letters in murls.