#include <iostream>

using namespace std ;


string s1 ;
int c1, c2 ;
int number = 0;

int main()
{
    while(cin)
    {
        cin >> s1 >> c1 >> c2 ;

        if(s1 == "0" && c1 == 0 && c2 == 0)
            return  0 ;

        for(int i = 0 ; i < s1.size() ; ++ i)
            {if((s1[i] - '0') == c1)
                s1[i] = c2 ;
            }
            cout << s1 << '\n' ;




    }


    return  0 ;
}