#include <bits/stdc++.h>

using namespace std;

int c1, c2;
string S;

int main() {
//	freopen("date.in", "r", stdin);
//	freopen("date.out","w", stdout);
	cin.sync_with_stdio(false);
	
	while (cin >> S >> c1 >> c2) {
		if (c1 == 0 && c2 == 0 && S == string("0")) {
			break;
		}
		for (size_t i = 0; i < S.size(); i++) {
			if (S[i] - '0' == c1) {
				S[i] = '0' + c2;
			}
		}
		while (S.size() > 1 && S[0] == '0') {
			S = S.substr(1);
		}
		cout << S << '\n';
	}
	
	return 0;
}