pyyg ypyg pyyg ypyg yypg yypg pygy ypgy pgyy gpyy ygpy gypy pygy ypgy pgyy gpyy ygpy gypy yygp yygp ygyp gyyp ygyp gyyp
Note: these 'words' (valid or invalid) are all the permutations of the word pyyg. These words are obtained by scrambling the letters in pyyg.