am i missing something in the next palindrome

i dont know why my code is giving wrong answer , it works very fine on my machine , suggest test case here’s the link

@ana1nd_9 it is quite difficult to understand ones code so i suggest you to have a look on my code i think then you will get where are you missing if even not then feel free to comment here again.

here is the link to my code

here is link to my code