yells eylls ylels lyels elyls leyls yells eylls ylels lyels elyls leyls ylles lyles ylles lyles llyes llyes ellys lelys ellys lelys lleys lleys yelsl eylsl ylesl lyesl elysl leysl yesll eysll ysell syell esyll seyll ylsel lysel yslel sylel lsyel slyel elsyl lesyl eslyl selyl lseyl sleyl yelsl eylsl ylesl lyesl elysl leysl yesll eysll ysell syell esyll seyll ylsel lysel yslel sylel lsyel slyel elsyl lesyl eslyl selyl lseyl sleyl yllse lylse yllse lylse llyse llyse ylsle lysle yslle sylle lsyle slyle ylsle lysle yslle sylle lsyle slyle llsye llsye lslye sllye lslye sllye ellsy lelsy ellsy lelsy llesy llesy elsly lesly eslly selly lsely slely elsly lesly eslly selly lsely slely llsey llsey lsley slley lsley slley
Note: these 'words' (valid or invalid) are all the permutations of the word yells. These words are obtained by scrambling the letters in yells.