fouat ofuat fuoat ufoat oufat uofat foaut ofaut faout afout oafut aofut fuaot ufaot fauot afuot uafot aufot ouaft uoaft oauft aouft uaoft auoft fouta ofuta fuota ufota oufta uofta fotua oftua ftoua tfoua otfua tofua futoa uftoa ftuoa tfuoa utfoa tufoa outfa uotfa otufa toufa utofa tuofa foatu ofatu faotu afotu oaftu aoftu fotau oftau ftoau tfoau otfau tofau fatou aftou ftaou tfaou atfou tafou oatfu aotfu otafu toafu atofu taofu fuato ufato fauto afuto uafto aufto futao uftao ftuao tfuao utfao tufao fatuo aftuo ftauo tfauo atfuo tafuo uatfo autfo utafo tuafo atufo taufo ouatf uoatf oautf aoutf uaotf auotf outaf uotaf otuaf touaf utoaf tuoaf oatuf aotuf otauf toauf atouf taouf uatof autof utaof tuaof atuof tauof
Note: these 'words' (valid or invalid) are all the permutations of the word fouat. These words are obtained by scrambling the letters in fouat.