laugh alugh luagh ulagh aulgh ualgh laguh alguh lgauh glauh agluh galuh lugah ulgah lguah gluah uglah gulah auglh uaglh agulh gaulh ugalh gualh lauhg aluhg luahg ulahg aulhg ualhg lahug alhug lhaug hlaug ahlug halug luhag ulhag lhuag hluag uhlag hulag auhlg uahlg ahulg haulg uhalg hualg laghu alghu lgahu glahu aglhu galhu lahgu alhgu lhagu hlagu ahlgu halgu lghau glhau lhgau hlgau ghlau hglau aghlu gahlu ahglu haglu ghalu hgalu lugha ulgha lguha gluha uglha gulha luhga ulhga lhuga hluga uhlga hulga lghua glhua lhgua hlgua ghlua hglua ughla guhla uhgla hugla ghula hgula aughl uaghl aguhl gauhl ugahl guahl auhgl uahgl ahugl haugl uhagl huagl aghul gahul ahgul hagul ghaul hgaul ughal guhal uhgal hugal ghual hgual
Note: these 'words' (valid or invalid) are all the permutations of the word laugh. These words are obtained by scrambling the letters in laugh.