rugby urgby rguby gruby ugrby gurby rubgy urbgy rbugy brugy ubrgy burgy rgbuy grbuy rbguy brguy gbruy bgruy ugbry gubry ubgry bugry gbury bgury rugyb urgyb rguyb gruyb ugryb guryb ruygb urygb ryugb yrugb uyrgb yurgb rgyub gryub rygub yrgub gyrub ygrub ugyrb guyrb uygrb yugrb gyurb ygurb rubyg urbyg rbuyg bruyg ubryg buryg ruybg urybg ryubg yrubg uyrbg yurbg rbyug bryug rybug yrbug byrug ybrug ubyrg buyrg uybrg yubrg byurg yburg rgbyu grbyu rbgyu brgyu gbryu bgryu rgybu grybu rygbu yrgbu gyrbu ygrbu rbygu brygu rybgu yrbgu byrgu ybrgu gbyru bgyru gybru ygbru bygru ybgru ugbyr gubyr ubgyr bugyr gbuyr bguyr ugybr guybr uygbr yugbr gyubr ygubr ubygr buygr uybgr yubgr byugr ybugr gbyur bgyur gybur ygbur bygur ybgur
Note: these 'words' (valid or invalid) are all the permutations of the word rugby. These words are obtained by scrambling the letters in rugby.