Problems
Interesting Sum
Interesting Sum
Given a three-digit positive integer n. Find the sum of the largest and the smallest three-digit numbers that can be formed from a permutation of n numbers.
Input data
One integer n (100 ≤ n ≤ 999).
Output data
Print the sum of the largest and the smallest three-digit number.
Examples
Input example #1
524
Output example #1
787