shills hsills sihlls ishlls hislls ihslls shlils hslils slhils lshils hlsils lhsils silhls islhls slihls lsihls ilshls lishls hilsls ihlsls hlisls lhisls ilhsls lihsls shills hsills sihlls ishlls hislls ihslls shlils hslils slhils lshils hlsils lhsils silhls islhls slihls lsihls ilshls lishls hilsls ihlsls hlisls lhisls ilhsls lihsls shllis hsllis slhlis lshlis hlslis lhslis shllis hsllis slhlis lshlis hlslis lhslis sllhis lslhis sllhis lslhis llshis llshis hllsis lhlsis hllsis lhlsis llhsis llhsis sillhs isllhs slilhs lsilhs ilslhs lislhs sillhs isllhs slilhs lsilhs ilslhs lislhs sllihs lslihs sllihs lslihs llsihs llsihs illshs lilshs illshs lilshs llishs llishs hillss ihllss hlilss lhilss ilhlss lihlss hillss ihllss hlilss lhilss ilhlss lihlss hlliss lhliss hlliss lhliss llhiss llhiss illhss lilhss illhss lilhss llihss llihss shilsl hsilsl sihlsl ishlsl hislsl ihslsl shlisl hslisl slhisl lshisl hlsisl lhsisl silhsl islhsl slihsl lsihsl ilshsl lishsl hilssl ihlssl hlissl lhissl ilhssl lihssl shisll hsisll sihsll ishsll hissll ihssll shsill hssill sshill sshill hssill shsill sishll isshll ssihll ssihll isshll sishll hissll ihssll hsisll shisll ishsll sihsll shlsil hslsil slhsil lshsil hlssil lhssil shslil hsslil sshlil sshlil hsslil shslil slshil lsshil sslhil sslhil lsshil slshil hlssil lhssil hslsil shlsil lshsil slhsil silshl islshl slishl lsishl ilsshl lisshl sislhl isslhl ssilhl ssilhl isslhl sislhl slsihl lssihl sslihl sslihl lssihl slsihl ilsshl lisshl islshl silshl lsishl slishl hilssl ihlssl hlissl lhissl ilhssl lihssl hislsl ihslsl hsilsl shilsl ishlsl sihlsl hlsisl lhsisl hslisl shlisl lshisl slhisl ilshsl lishsl islhsl silhsl lsihsl slihsl shilsl hsilsl sihlsl ishlsl hislsl ihslsl shlisl hslisl slhisl lshisl hlsisl lhsisl silhsl islhsl slihsl lsihsl ilshsl lishsl hilssl ihlssl hlissl lhissl ilhssl lihssl shisll hsisll sihsll ishsll hissll ihssll shsill hssill sshill sshill hssill shsill sishll isshll ssihll ssihll isshll sishll hissll ihssll hsisll shisll ishsll sihsll shlsil hslsil slhsil lshsil hlssil lhssil shslil hsslil sshlil sshlil hsslil shslil slshil lsshil sslhil sslhil lsshil slshil hlssil lhssil hslsil shlsil lshsil slhsil silshl islshl slishl lsishl ilsshl lisshl sislhl isslhl ssilhl ssilhl isslhl sislhl slsihl lssihl sslihl sslihl lssihl slsihl ilsshl lisshl islshl silshl lsishl slishl hilssl ihlssl hlissl lhissl ilhssl lihssl hislsl ihslsl hsilsl shilsl ishlsl sihlsl hlsisl lhsisl hslisl shlisl lshisl slhisl ilshsl lishsl islhsl silhsl lsihsl slihsl shllsi hsllsi slhlsi lshlsi hlslsi lhslsi shllsi hsllsi slhlsi lshlsi hlslsi lhslsi sllhsi lslhsi sllhsi lslhsi llshsi llshsi hllssi lhlssi hllssi lhlssi llhssi llhssi shlsli hslsli slhsli lshsli hlssli lhssli shslli hsslli sshlli sshlli hsslli shslli slshli lsshli sslhli sslhli lsshli slshli hlssli lhssli hslsli shlsli lshsli slhsli shlsli hslsli slhsli lshsli hlssli lhssli shslli hsslli sshlli sshlli hsslli shslli slshli lsshli sslhli sslhli lsshli slshli hlssli lhssli hslsli shlsli lshsli slhsli sllshi lslshi sllshi lslshi llsshi llsshi slslhi lsslhi ssllhi ssllhi lsslhi slslhi slslhi lsslhi ssllhi ssllhi lsslhi slslhi llsshi llsshi lslshi sllshi lslshi sllshi hllssi lhlssi hllssi lhlssi llhssi llhssi hlslsi lhslsi hsllsi shllsi lshlsi slhlsi hlslsi lhslsi hsllsi shllsi lshlsi slhlsi llshsi llshsi lslhsi sllhsi lslhsi sllhsi sillsh isllsh slilsh lsilsh ilslsh lislsh sillsh isllsh slilsh lsilsh ilslsh lislsh sllish lslish sllish lslish llsish llsish illssh lilssh illssh lilssh llissh llissh silslh islslh slislh lsislh ilsslh lisslh sisllh issllh ssillh ssillh issllh sisllh slsilh lssilh sslilh sslilh lssilh slsilh ilsslh lisslh islslh silslh lsislh slislh silslh islslh slislh lsislh ilsslh lisslh sisllh issllh ssillh ssillh issllh sisllh slsilh lssilh sslilh sslilh lssilh slsilh ilsslh lisslh islslh silslh lsislh slislh sllsih lslsih sllsih lslsih llssih llssih slslih lsslih ssllih ssllih lsslih slslih slslih lsslih ssllih ssllih lsslih slslih llssih llssih lslsih sllsih lslsih sllsih illssh lilssh illssh lilssh llissh llissh ilslsh lislsh isllsh sillsh lsilsh slilsh ilslsh lislsh isllsh sillsh lsilsh slilsh llsish llsish lslish sllish lslish sllish hillss ihllss hlilss lhilss ilhlss lihlss hillss ihllss hlilss lhilss ilhlss lihlss hlliss lhliss hlliss lhliss llhiss llhiss illhss lilhss illhss lilhss llihss llihss hilsls ihlsls hlisls lhisls ilhsls lihsls hislls ihslls hsills shills ishlls sihlls hlsils lhsils hslils shlils lshils slhils ilshls lishls islhls silhls lsihls slihls hilsls ihlsls hlisls lhisls ilhsls lihsls hislls ihslls hsills shills ishlls sihlls hlsils lhsils hslils shlils lshils slhils ilshls lishls islhls silhls lsihls slihls hllsis lhlsis hllsis lhlsis llhsis llhsis hlslis lhslis hsllis shllis lshlis slhlis hlslis lhslis hsllis shllis lshlis slhlis llshis llshis lslhis sllhis lslhis sllhis illshs lilshs illshs lilshs llishs llishs ilslhs lislhs isllhs sillhs lsilhs slilhs ilslhs lislhs isllhs sillhs lsilhs slilhs llsihs llsihs lslihs sllihs lslihs sllihs
Note: these 'words' (valid or invalid) are all the permutations of the word shills. These words are obtained by scrambling the letters in shills.