Weak test cases

[tusharkhandelwal315 (tushar khandelwal)]

i think that smart keypad-advanced has weak test cases as it also pass the code which prints duplicates of strings

[rishabhmahajan546 (rishabh mahajan)]

@tusharkhandelwal315 hello bro,hojata hai kabhi kabhar aisa ki kisi question me chal jate hai apka logic sahi hona chyy bs,just take care of that