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