swill wsill siwll iswll wisll iwsll swlil wslil slwil lswil wlsil lwsil silwl islwl sliwl lsiwl ilswl liswl wilsl iwlsl wlisl lwisl ilwsl liwsl swill wsill siwll iswll wisll iwsll swlil wslil slwil lswil wlsil lwsil silwl islwl sliwl lsiwl ilswl liswl wilsl iwlsl wlisl lwisl ilwsl liwsl swlli wslli slwli lswli wlsli lwsli swlli wslli slwli lswli wlsli lwsli sllwi lslwi sllwi lslwi llswi llswi wllsi lwlsi wllsi lwlsi llwsi llwsi sillw isllw slilw lsilw ilslw lislw sillw isllw slilw lsilw ilslw lislw slliw lsliw slliw lsliw llsiw llsiw illsw lilsw illsw lilsw llisw llisw wills iwlls wlils lwils ilwls liwls wills iwlls wlils lwils ilwls liwls wllis lwlis wllis lwlis llwis llwis illws lilws illws lilws lliws lliws
Note: these 'words' (valid or invalid) are all the permutations of the word swill. These words are obtained by scrambling the letters in swill.