pelfs eplfs plefs lpefs elpfs lepfs pefls epfls pfels fpels efpls fepls plfes lpfes pfles fples lfpes flpes elfps lefps eflps felps lfeps fleps pelsf eplsf plesf lpesf elpsf lepsf peslf epslf pself spelf esplf seplf plsef lpsef pslef splef lspef slpef elspf lespf eslpf selpf lsepf slepf pefsl epfsl pfesl fpesl efpsl fepsl pesfl epsfl psefl spefl espfl sepfl pfsel fpsel psfel spfel fspel sfpel efspl fespl esfpl sefpl fsepl sfepl plfse lpfse pflse fplse lfpse flpse plsfe lpsfe pslfe splfe lspfe slpfe pfsle fpsle psfle spfle fsple sfple lfspe flspe lsfpe slfpe fslpe sflpe elfsp lefsp eflsp felsp lfesp flesp elsfp lesfp eslfp selfp lsefp slefp efslp feslp esflp seflp fselp sfelp lfsep flsep lsfep slfep fslep sflep
Note: these 'words' (valid or invalid) are all the permutations of the word pelfs. These words are obtained by scrambling the letters in pelfs.