#include <cstdio>
#include <string>
#include <iostream>

using namespace std;

int main ()
{
    //freopen ("date.in", " r", stdin);
    int c1, c2;
    string n;

    while (1)
    {
        cin >> n >> c1 >> c2;
        if (n == "0" && c1 == 0 && c2 == 0)
            break;

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

        int nr = 0;
        for (int i = 0; i < n.size (); ++i)
            nr = nr * 10 + n[i] - '0';
        cout << nr << '\n';
    }

    return 0;
}