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