lough olugh luogh ulogh oulgh uolgh loguh olguh lgouh glouh ogluh goluh lugoh ulgoh lguoh gluoh ugloh guloh ouglh uoglh ogulh goulh ugolh guolh louhg oluhg luohg ulohg oulhg uolhg lohug olhug lhoug hloug ohlug holug luhog ulhog lhuog hluog uhlog hulog ouhlg uohlg ohulg houlg uholg huolg loghu olghu lgohu glohu oglhu golhu lohgu olhgu lhogu hlogu ohlgu holgu lghou glhou lhgou hlgou ghlou hglou oghlu gohlu ohglu hoglu gholu hgolu lugho ulgho lguho gluho uglho gulho luhgo ulhgo lhugo hlugo uhlgo hulgo lghuo glhuo lhguo hlguo ghluo hgluo ughlo guhlo uhglo huglo ghulo hgulo oughl uoghl oguhl gouhl ugohl guohl ouhgl uohgl ohugl hougl uhogl huogl oghul gohul ohgul hogul ghoul hgoul ughol guhol uhgol hugol ghuol hguol
Note: these 'words' (valid or invalid) are all the permutations of the word lough. These words are obtained by scrambling the letters in lough.