sipes ispes spies psies ipses pises sieps iseps seips esips iesps eisps speis pseis sepis espis pesis epsis ipess piess iepss eipss peiss episs sipse ispse spise psise ipsse pisse sispe isspe ssipe ssipe isspe sispe spsie pssie sspie sspie pssie spsie ipsse pisse ispse sipse psise spise siesp isesp seisp esisp iessp eissp sisep issep ssiep ssiep issep sisep sesip essip sseip sseip essip sesip iessp eissp isesp siesp esisp seisp spesi psesi sepsi espsi pessi epssi spsei pssei sspei sspei pssei spsei sespi esspi ssepi ssepi esspi sespi pessi epssi psesi spesi espsi sepsi ipess piess iepss eipss peiss episs ipses pises ispes sipes psies spies iesps eisps iseps sieps esips seips pesis epsis pseis speis espis sepis
Note: these 'words' (valid or invalid) are all the permutations of the word sipes. These words are obtained by scrambling the letters in sipes.