loofs olofs loofs olofs oolfs oolfs lofos olfos lfoos floos oflos folos lofos olfos lfoos floos oflos folos oofls oofls ofols fools ofols fools loosf olosf loosf olosf oolsf oolsf losof olsof lsoof sloof oslof solof losof olsof lsoof sloof oslof solof ooslf ooslf osolf soolf osolf soolf lofso olfso lfoso floso oflso folso losfo olsfo lsofo slofo oslfo solfo lfsoo flsoo lsfoo slfoo fsloo sfloo ofslo foslo osflo soflo fsolo sfolo lofso olfso lfoso floso oflso folso losfo olsfo lsofo slofo oslfo solfo lfsoo flsoo lsfoo slfoo fsloo sfloo ofslo foslo osflo soflo fsolo sfolo oofsl oofsl ofosl foosl ofosl foosl oosfl oosfl osofl soofl osofl soofl ofsol fosol osfol sofol fsool sfool ofsol fosol osfol sofol fsool sfool
Note: these 'words' (valid or invalid) are all the permutations of the word loofs. These words are obtained by scrambling the letters in loofs.