swills wsills siwlls iswlls wislls iwslls swlils wslils slwils lswils wlsils lwsils silwls islwls sliwls lsiwls ilswls liswls wilsls iwlsls wlisls lwisls ilwsls liwsls swills wsills siwlls iswlls wislls iwslls swlils wslils slwils lswils wlsils lwsils silwls islwls sliwls lsiwls ilswls liswls wilsls iwlsls wlisls lwisls ilwsls liwsls swllis wsllis slwlis lswlis wlslis lwslis swllis wsllis slwlis lswlis wlslis lwslis sllwis lslwis sllwis lslwis llswis llswis wllsis lwlsis wllsis lwlsis llwsis llwsis sillws isllws slilws lsilws ilslws lislws sillws isllws slilws lsilws ilslws lislws slliws lsliws slliws lsliws llsiws llsiws illsws lilsws illsws lilsws llisws llisws willss iwllss wlilss lwilss ilwlss liwlss willss iwllss wlilss lwilss ilwlss liwlss wlliss lwliss wlliss lwliss llwiss llwiss illwss lilwss illwss lilwss lliwss lliwss swilsl wsilsl siwlsl iswlsl wislsl iwslsl swlisl wslisl slwisl lswisl wlsisl lwsisl silwsl islwsl sliwsl lsiwsl ilswsl liswsl wilssl iwlssl wlissl lwissl ilwssl liwssl swisll wsisll siwsll iswsll wissll iwssll swsill wssill sswill sswill wssill swsill siswll isswll ssiwll ssiwll isswll siswll wissll iwssll wsisll swisll iswsll siwsll swlsil wslsil slwsil lswsil wlssil lwssil swslil wsslil sswlil sswlil wsslil swslil slswil lsswil sslwil sslwil lsswil slswil wlssil lwssil wslsil swlsil lswsil slwsil silswl islswl sliswl lsiswl ilsswl lisswl sislwl isslwl ssilwl ssilwl isslwl sislwl slsiwl lssiwl ssliwl ssliwl lssiwl slsiwl ilsswl lisswl islswl silswl lsiswl sliswl wilssl iwlssl wlissl lwissl ilwssl liwssl wislsl iwslsl wsilsl swilsl iswlsl siwlsl wlsisl lwsisl wslisl swlisl lswisl slwisl ilswsl liswsl islwsl silwsl lsiwsl sliwsl swilsl wsilsl siwlsl iswlsl wislsl iwslsl swlisl wslisl slwisl lswisl wlsisl lwsisl silwsl islwsl sliwsl lsiwsl ilswsl liswsl wilssl iwlssl wlissl lwissl ilwssl liwssl swisll wsisll siwsll iswsll wissll iwssll swsill wssill sswill sswill wssill swsill siswll isswll ssiwll ssiwll isswll siswll wissll iwssll wsisll swisll iswsll siwsll swlsil wslsil slwsil lswsil wlssil lwssil swslil wsslil sswlil sswlil wsslil swslil slswil lsswil sslwil sslwil lsswil slswil wlssil lwssil wslsil swlsil lswsil slwsil silswl islswl sliswl lsiswl ilsswl lisswl sislwl isslwl ssilwl ssilwl isslwl sislwl slsiwl lssiwl ssliwl ssliwl lssiwl slsiwl ilsswl lisswl islswl silswl lsiswl sliswl wilssl iwlssl wlissl lwissl ilwssl liwssl wislsl iwslsl wsilsl swilsl iswlsl siwlsl wlsisl lwsisl wslisl swlisl lswisl slwisl ilswsl liswsl islwsl silwsl lsiwsl sliwsl swllsi wsllsi slwlsi lswlsi wlslsi lwslsi swllsi wsllsi slwlsi lswlsi wlslsi lwslsi sllwsi lslwsi sllwsi lslwsi llswsi llswsi wllssi lwlssi wllssi lwlssi llwssi llwssi swlsli wslsli slwsli lswsli wlssli lwssli swslli wsslli sswlli sswlli wsslli swslli slswli lsswli sslwli sslwli lsswli slswli wlssli lwssli wslsli swlsli lswsli slwsli swlsli wslsli slwsli lswsli wlssli lwssli swslli wsslli sswlli sswlli wsslli swslli slswli lsswli sslwli sslwli lsswli slswli wlssli lwssli wslsli swlsli lswsli slwsli sllswi lslswi sllswi lslswi llsswi llsswi slslwi lsslwi ssllwi ssllwi lsslwi slslwi slslwi lsslwi ssllwi ssllwi lsslwi slslwi llsswi llsswi lslswi sllswi lslswi sllswi wllssi lwlssi wllssi lwlssi llwssi llwssi wlslsi lwslsi wsllsi swllsi lswlsi slwlsi wlslsi lwslsi wsllsi swllsi lswlsi slwlsi llswsi llswsi lslwsi sllwsi lslwsi sllwsi sillsw isllsw slilsw lsilsw ilslsw lislsw sillsw isllsw slilsw lsilsw ilslsw lislsw sllisw lslisw sllisw lslisw llsisw llsisw illssw lilssw illssw lilssw llissw llissw silslw islslw slislw lsislw ilsslw lisslw sisllw issllw ssillw ssillw issllw sisllw slsilw lssilw sslilw sslilw lssilw slsilw ilsslw lisslw islslw silslw lsislw slislw silslw islslw slislw lsislw ilsslw lisslw sisllw issllw ssillw ssillw issllw sisllw slsilw lssilw sslilw sslilw lssilw slsilw ilsslw lisslw islslw silslw lsislw slislw sllsiw lslsiw sllsiw lslsiw llssiw llssiw slsliw lssliw sslliw sslliw lssliw slsliw slsliw lssliw sslliw sslliw lssliw slsliw llssiw llssiw lslsiw sllsiw lslsiw sllsiw illssw lilssw illssw lilssw llissw llissw ilslsw lislsw isllsw sillsw lsilsw slilsw ilslsw lislsw isllsw sillsw lsilsw slilsw llsisw llsisw lslisw sllisw lslisw sllisw willss iwllss wlilss lwilss ilwlss liwlss willss iwllss wlilss lwilss ilwlss liwlss wlliss lwliss wlliss lwliss llwiss llwiss illwss lilwss illwss lilwss lliwss lliwss wilsls iwlsls wlisls lwisls ilwsls liwsls wislls iwslls wsills swills iswlls siwlls wlsils lwsils wslils swlils lswils slwils ilswls liswls islwls silwls lsiwls sliwls wilsls iwlsls wlisls lwisls ilwsls liwsls wislls iwslls wsills swills iswlls siwlls wlsils lwsils wslils swlils lswils slwils ilswls liswls islwls silwls lsiwls sliwls wllsis lwlsis wllsis lwlsis llwsis llwsis wlslis lwslis wsllis swllis lswlis slwlis wlslis lwslis wsllis swllis lswlis slwlis llswis llswis lslwis sllwis lslwis sllwis illsws lilsws illsws lilsws llisws llisws ilslws lislws isllws sillws lsilws slilws ilslws lislws isllws sillws lsilws slilws llsiws llsiws lsliws slliws lsliws slliws
Note: these 'words' (valid or invalid) are all the permutations of the word swills. These words are obtained by scrambling the letters in swills.