#include <iostream>
#include <string>
using namespace std;
int main()
{
    int a[10] = {0,0,0,0,0,0,0,0,0,0}, i = 0;
    string s;
    cin >> s;

    while (s[i] != '.') {
        a[int(s[i])-48]++;
        i++;
    }

    for (int m = 1; m <= 10; m++) {
        for (int j = 0; j < 10; j++) {
            if (a[j] == m) cout << j;
        }
    }

    cout << endl;
    return 0;
}