ybgl bygl ygbl gybl bgyl gbyl yblg bylg ylbg lybg blyg lbyg yglb gylb ylgb lygb glyb lgyb bgly gbly blgy lbgy glby lgby
Note: these 'words' (valid or invalid) are all the permutations of the word ybgl. These words are obtained by scrambling the letters in ybgl.