pills iplls plils lpils ilpls lipls pills iplls plils lpils ilpls lipls pllis lplis pllis lplis llpis llpis illps lilps illps lilps llips llips pilsl iplsl plisl lpisl ilpsl lipsl pisll ipsll psill spill ispll sipll plsil lpsil pslil splil lspil slpil ilspl lispl islpl silpl lsipl slipl pilsl iplsl plisl lpisl ilpsl lipsl pisll ipsll psill spill ispll sipll plsil lpsil pslil splil lspil slpil ilspl lispl islpl silpl lsipl slipl pllsi lplsi pllsi lplsi llpsi llpsi plsli lpsli pslli splli lspli slpli plsli lpsli pslli splli lspli slpli llspi llspi lslpi sllpi lslpi sllpi illsp lilsp illsp lilsp llisp llisp ilslp lislp isllp sillp lsilp slilp ilslp lislp isllp sillp lsilp slilp llsip llsip lslip sllip lslip sllip
Note: these 'words' (valid or invalid) are all the permutations of the word pills. These words are obtained by scrambling the letters in pills.