wheil hweil wehil ewhil hewil ehwil whiel hwiel wihel iwhel hiwel ihwel weihl ewihl wiehl iwehl eiwhl iewhl heiwl ehiwl hiewl ihewl eihwl iehwl wheli hweli wehli ewhli hewli ehwli whlei hwlei wlhei lwhei hlwei lhwei welhi ewlhi wlehi lwehi elwhi lewhi helwi ehlwi hlewi lhewi elhwi lehwi while hwile wihle iwhle hiwle ihwle whlie hwlie wlhie lwhie hlwie lhwie wilhe iwlhe wlihe lwihe ilwhe liwhe hilwe ihlwe hliwe lhiwe ilhwe lihwe weilh ewilh wielh iwelh eiwlh iewlh welih ewlih wleih lweih elwih lewih wileh iwleh wlieh lwieh ilweh liweh eilwh ielwh eliwh leiwh ilewh liewh heilw ehilw hielw ihelw eihlw iehlw heliw ehliw hleiw lheiw elhiw lehiw hilew ihlew hliew lhiew ilhew lihew eilhw ielhw elihw leihw ilehw liehw
Note: these 'words' (valid or invalid) are all the permutations of the word wheil. These words are obtained by scrambling the letters in wheil.