Description

Given any four-digit number, rearrange its digits to form the largest and smallest possible four-digit numbers, and calculate the difference between them.
For example: For the number $3721$, you can form $7321$ and $1237$, and the difference is $7321−1237$.

Input Format

A four-digit number.

Output Format

The difference as described in the problem.

Sample

3721

6084