fowls ofwls fwols wfols owfls wofls folws oflws flows lfows olfws lofws fwlos wflos flwos lfwos wlfos lwfos owlfs wolfs olwfs lowfs wlofs lwofs fowsl ofwsl fwosl wfosl owfsl wofsl foswl ofswl fsowl sfowl osfwl sofwl fwsol wfsol fswol sfwol wsfol swfol owsfl wosfl oswfl sowfl wsofl swofl folsw oflsw flosw lfosw olfsw lofsw foslw ofslw fsolw sfolw osflw soflw flsow lfsow fslow sflow lsfow slfow olsfw losfw oslfw solfw lsofw slofw fwlso wflso flwso lfwso wlfso lwfso fwslo wfslo fswlo sfwlo wsflo swflo flswo lfswo fslwo sflwo lsfwo slfwo wlsfo lwsfo wslfo swlfo lswfo slwfo owlsf wolsf olwsf lowsf wlosf lwosf owslf woslf oswlf sowlf wsolf swolf olswf loswf oslwf solwf lsowf slowf wlsof lwsof wslof swlof lswof slwof
Note: these 'words' (valid or invalid) are all the permutations of the word fowls. These words are obtained by scrambling the letters in fowls.