lills illls llils llils illls lills lills illls llils llils illls lills lllis lllis lllis lllis lllis lllis illls lills illls lills llils llils lilsl illsl llisl llisl illsl lilsl lisll ilsll lsill slill islll silll llsil llsil lslil sllil lslil sllil ilsll lisll islll silll lsill slill lilsl illsl llisl llisl illsl lilsl lisll ilsll lsill slill islll silll llsil llsil lslil sllil lslil sllil ilsll lisll islll silll lsill slill lllsi lllsi lllsi lllsi lllsi lllsi llsli llsli lslli sllli lslli sllli llsli llsli lslli sllli lslli sllli llsli llsli lslli sllli lslli sllli illsl lilsl illsl lilsl llisl llisl ilsll lisll islll silll lsill slill ilsll lisll islll silll lsill slill llsil llsil lslil sllil lslil sllil
Note: these 'words' (valid or invalid) are all the permutations of the word lills. These words are obtained by scrambling the letters in lills.