yxlm xylm ylxm lyxm xlym lxym yxml xyml ymxl myxl xmyl mxyl ylmx lymx ymlx mylx lmyx mlyx xlmy lxmy xmly mxly lmxy mlxy
Note: these 'words' (valid or invalid) are all the permutations of the word yxlm. These words are obtained by scrambling the letters in yxlm.