Palindrome Number

Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Note: Negative numbers are NOT palindromes. Example: 121 → true (reads same backward), -121 → false (negative), 10 → false (01 ≠ 10)

Input

A single integer.

Output

'true' if palindrome, 'false' otherwise.

Sample

121

Expected

true