mules umles mlues lmues ulmes lumes muels umels meuls emuls uemls eumls mleus lmeus melus emlus lemus elmus ulems luems uelms eulms leums elums mulse umlse mluse lmuse ulmse lumse musle umsle msule smule usmle sumle mlsue lmsue mslue smlue lsmue slmue ulsme lusme uslme sulme lsume slume muesl umesl meusl emusl uemsl eumsl musel umsel msuel smuel usmel sumel mesul emsul mseul smeul esmul semul uesml eusml useml sueml esuml seuml mlesu lmesu melsu emlsu lemsu elmsu mlseu lmseu msleu smleu lsmeu slmeu meslu emslu mselu smelu esmlu semlu lesmu elsmu lsemu slemu eslmu selmu ulesm luesm uelsm eulsm leusm elusm ulsem lusem uslem sulem lsuem sluem ueslm euslm uselm suelm esulm seulm lesum elsum lseum sleum eslum selum
Note: these 'words' (valid or invalid) are all the permutations of the word mules. These words are obtained by scrambling the letters in mules.