#include <iostream.h>
#include <fstream.h>

long int b[10];
int i, c, x;

int main()
{
    ifstream fin("numere.txt");
    i = 0;
    while( fin >> x )    
           while( x )
           {
                  b[x % 10]++;
                  x = x / 10;
           }
   
    c = 9;
    while( c >= 0)
    {
           for( int k = 1; k <=b[c]; k++)
                cout << c;
           c--;
    }
    cout << endl;
    
    fin.close();
    system("pause");
    return 0;
}