ruggy urggy rgugy grugy ugrgy gurgy ruggy urggy rgugy grugy ugrgy gurgy rgguy grguy rgguy grguy ggruy ggruy uggry gugry uggry gugry ggury ggury rugyg urgyg rguyg gruyg ugryg guryg ruygg urygg ryugg yrugg uyrgg yurgg rgyug gryug rygug yrgug gyrug ygrug ugyrg guyrg uygrg yugrg gyurg ygurg rugyg urgyg rguyg gruyg ugryg guryg ruygg urygg ryugg yrugg uyrgg yurgg rgyug gryug rygug yrgug gyrug ygrug ugyrg guyrg uygrg yugrg gyurg ygurg rggyu grgyu rggyu grgyu ggryu ggryu rgygu grygu ryggu yrggu gyrgu ygrgu rgygu grygu ryggu yrggu gyrgu ygrgu ggyru ggyru gygru yggru gygru yggru uggyr gugyr uggyr gugyr gguyr gguyr ugygr guygr uyggr yuggr gyugr ygugr ugygr guygr uyggr yuggr gyugr ygugr ggyur ggyur gygur yggur gygur yggur
Note: these 'words' (valid or invalid) are all the permutations of the word ruggy. These words are obtained by scrambling the letters in ruggy.