Problem Statement

You are given an integer $N$ between $0$ and $9999$ (inclusive).

Print it as a four-digit string after appending to it the necessary number of leading zeros.

Constraints

• $0 \\leq N \\leq 9999$
• $N$ is an integer.

Input

Input is given from Standard Input in the following format:

$N$

Output

Print the answer.

Sample Input 1

321

Sample Output 1

0321

$321$ has three digits, so we need to add one leading zero to it to make it have four digits.

Sample Input 2

7777

Sample Output 2

7777

Sample Input 3

1

Sample Output 3

0001