Break the Myth

In Chef village there is a myth that there does not exist any string which is not a palindrome. Chef however an intellectual guy knows that it's not true. Chef challenges the villagers that he will be able to convert any string to a non-palindromic string. The chef will be given a list of $T$ strings. The chef will try to change each string having a length $N$ to a non-palindromic and if he ca