#include <iostream>
#include <fstream>
using namespace std;
void cmax(int a, int &b)
{
    b=0;
    while(a)
    {
        if(a%10>b)
            b=a%10;
        a=a/10;
    }
}
int main()
{
    int n, numere=0;
  ifstream f("bac.txt");
  while(f>>n)
  {
      int x;
    cmax(n,x);
    cout<<x<<" ";
  }


}