#include <iostream>

using namespace std;

int numar(int n, int c1, int c2)
{
    int r=0;
    int p=1;

    while(n)
    {
        if(n%10==c1)
        {
           r=r+p*c2;
          p=p*10;
          n=n/10;
        } else
        {
           r=r+p*(n%10);
          p=p*10;
        n=n/10;
        }


    }
return r;
}
int main()
{
    cout<<numar(14944, 4, 2);

}