swirl wsirl siwrl iswrl wisrl iwsrl swril wsril srwil rswil wrsil rwsil sirwl isrwl sriwl rsiwl irswl riswl wirsl iwrsl wrisl rwisl irwsl riwsl swilr wsilr siwlr iswlr wislr iwslr swlir wslir slwir lswir wlsir lwsir silwr islwr sliwr lsiwr ilswr liswr wilsr iwlsr wlisr lwisr ilwsr liwsr swrli wsrli srwli rswli wrsli rwsli swlri wslri slwri lswri wlsri lwsri srlwi rslwi slrwi lsrwi rlswi lrswi wrlsi rwlsi wlrsi lwrsi rlwsi lrwsi sirlw isrlw srilw rsilw irslw rislw silrw islrw slirw lsirw ilsrw lisrw srliw rsliw slriw lsriw rlsiw lrsiw irlsw rilsw ilrsw lirsw rlisw lrisw wirls iwrls wrils rwils irwls riwls wilrs iwlrs wlirs lwirs ilwrs liwrs wrlis rwlis wlris lwris rlwis lrwis irlws rilws ilrws lirws rliws lriws
Note: these 'words' (valid or invalid) are all the permutations of the word swirl. These words are obtained by scrambling the letters in swirl.