butty ubtty btuty tbuty utbty tubty butty ubtty btuty tbuty utbty tubty bttuy tbtuy bttuy tbtuy ttbuy ttbuy uttby tutby uttby tutby ttuby ttuby butyt ubtyt btuyt tbuyt utbyt tubyt buytt ubytt byutt ybutt uybtt yubtt btyut tbyut bytut ybtut tybut ytbut utybt tuybt uytbt yutbt tyubt ytubt butyt ubtyt btuyt tbuyt utbyt tubyt buytt ubytt byutt ybutt uybtt yubtt btyut tbyut bytut ybtut tybut ytbut utybt tuybt uytbt yutbt tyubt ytubt bttyu tbtyu bttyu tbtyu ttbyu ttbyu btytu tbytu byttu ybttu tybtu ytbtu btytu tbytu byttu ybttu tybtu ytbtu ttybu ttybu tytbu yttbu tytbu yttbu uttyb tutyb uttyb tutyb ttuyb ttuyb utytb tuytb uyttb yuttb tyutb ytutb utytb tuytb uyttb yuttb tyutb ytutb ttyub ttyub tytub yttub tytub yttub
Note: these 'words' (valid or invalid) are all the permutations of the word butty. These words are obtained by scrambling the letters in butty.