#include <iostream>
#include <algorithm>

int main() {
    int num;
    std::cout << "?????????: ";
    std::cin >> num;

    // ???????
    int digits[3];
    digits[0] = num / 100;
    digits[1] = (num / 10) % 10;
    digits[2] = num % 10;

    // ?????????
    std::sort(digits, digits + 3, std::greater<int>());

    // ????????????
    int max_num = digits[0] * 100 + digits[1] * 10 + digits[2];

    std::cout << "?????????????: " << max_num << std::endl;

    return 0;
}    
/**************************************************************
	Problem: 1042
	User: fandaohan
	Language: C++
	Result: Wrong Answer
****************************************************************/