afoul faoul aoful oaful foaul ofaul afuol fauol aufol uafol fuaol ufaol aoufl oaufl auofl uaofl ouafl uoafl foual ofual fuoal ufoal oufal uofal afolu faolu aoflu oaflu foalu ofalu aflou falou alfou lafou flaou lfaou aolfu oalfu alofu laofu olafu loafu folau oflau floau lfoau olfau lofau afulo faulo auflo uaflo fualo ufalo afluo faluo alfuo lafuo flauo lfauo aulfo ualfo alufo laufo ulafo luafo fulao uflao fluao lfuao ulfao lufao aoulf oaulf auolf uaolf oualf uoalf aoluf oaluf alouf laouf olauf loauf aulof ualof aluof lauof ulaof luaof oulaf uolaf oluaf louaf uloaf luoaf foula ofula fuola ufola oufla uofla folua oflua floua lfoua olfua lofua fuloa ufloa fluoa lfuoa ulfoa lufoa oulfa uolfa olufa loufa ulofa luofa
Note: these 'words' (valid or invalid) are all the permutations of the word afoul. These words are obtained by scrambling the letters in afoul.