Palindrome Number Checker

This problem requires you to check whether a given number is a palindrome. A palindrome number is one that remains the same when its digits are reversed. Given a string representing a number, determine if it reads the same forwards and backwards. Your task is to output YES if the number is a palindrome, and NO otherwise.

For example, if the input is 121, the output should be YES since reversing 121 yields 121. However, if the input is 123001321, the output should be NO.

inputFormat

The input consists of a single line that contains a string representing a number. There are no spaces between the digits.

outputFormat

Output a single line containing the result: YES if the input string is a palindrome, and NO otherwise.

121

YES