#include <bits/stdc++.h>

using namespace std;

int main() {
    string a;
    int b, c;

    while(cin >> a >> b >> c) {
        if(a == "0" && b == 0 && c == 0) return 0;

        for(int i = 0; i < (int)a.size(); i++) {
            if(a[i] - '0' == b) {
                a[i] = (char)(c + '0');
            }
        }

        int pr = 0;
        while(pr < (int)a.size() - 1 && a[pr] == '0') pr++;

        for(int i = pr; i < (int)a.size(); i++) cout << a[i];
        cout << "\n";
    }
}