tubby utbby tbuby btuby ubtby butby tubby utbby tbuby btuby ubtby butby tbbuy btbuy tbbuy btbuy bbtuy bbtuy ubbty bubty ubbty bubty bbuty bbuty tubyb utbyb tbuyb btuyb ubtyb butyb tuybb utybb tyubb ytubb uytbb yutbb tbyub btyub tybub ytbub bytub ybtub ubytb buytb uybtb yubtb byutb ybutb tubyb utbyb tbuyb btuyb ubtyb butyb tuybb utybb tyubb ytubb uytbb yutbb tbyub btyub tybub ytbub bytub ybtub ubytb buytb uybtb yubtb byutb ybutb tbbyu btbyu tbbyu btbyu bbtyu bbtyu tbybu btybu tybbu ytbbu bytbu ybtbu tbybu btybu tybbu ytbbu bytbu ybtbu bbytu bbytu bybtu ybbtu bybtu ybbtu ubbyt bubyt ubbyt bubyt bbuyt bbuyt ubybt buybt uybbt yubbt byubt ybubt ubybt buybt uybbt yubbt byubt ybubt bbyut bbyut bybut ybbut bybut ybbut
Note: these 'words' (valid or invalid) are all the permutations of the word tubby. These words are obtained by scrambling the letters in tubby.