#include <iostream>
using namespace std;

int main()
{

    int br;
    int niz[10];
    int brParCif = 0;
    cout << "Unesite broj: ";
    cin >> br;
    int br2 = br;
    while (br2 != 0)
    {
        if ((br2 % 10) % 2 == 0)
        {
            niz[brParCif] = (br2 % 10);
            brParCif++;
        }
        br2 /= 10;
    }

    for (int i = 0; i < brParCif; i++)
    {
        for (int j = 0; j < brParCif; j++)
        {
            if (niz[i] < niz[j])
            {
                int temp = niz[i];
                niz[i] = niz[j];
                niz[j] = temp;
            }
        }
    }

    for (int i = 0; i < brParCif; i++)
        cout << niz[i];
    return 0;
}