#include <iostream>
#include <string.h>

using namespace std;

int main()
{
	char a[10],c1,c2;

	while (1) {
		cin >> a >> c1 >> c2;
		if (a[0] == '0' && c1 == '0' && c2 == '0') {
			break;
		}
		int len = strlen(a);
		for (int i = 0; i < len; i++) {
			if (a[i] == c1) {
				a[i] = c2;
			}
		}
		int i=0;
		while (1) {
			if (a[i] != '0') {
				break;
			}
			i++;
		}
		if (i != 0) {
			for (int j = 0; j < len - i; j++) {
				a[j] = a[j + i];
			}
			a[len - i] = '\0';
		}
		cout << a<<"\n";
	}

	return 0;
}