#include <iostream>
#include <cstdlib>
#include <algorithm>
using namespace std;

int main()
{
    int a[5];
    cin >> a[0] >> a[1] >> a[2] >> a[3] >> a[4];
    sort(a, a+5, greater<int>());
    cout << a[0] << a[1] << a[2] << a[3] << a[4];
    cout << endl;
    return EXIT_SUCCESS;
}