Description

A palindromic number is a number that remains the same when its digits are reversed.

Given a positive integer N, your task is to find the smallest palindromic number P that is greater than N.

Input Format

The input contains multiple test cases.

Each test case consists of a positive integer N, where N has no more than 10000 digits and does not contain leading zeros.

Output Format

For each test case, output the smallest palindromic number P that is greater than N.

```input1 44 3 175 ``` ```output1 55 4 181 ``` ## 来源

CodesOnline