#include<stdio.h>
#include<string.h>
int main() {

	char number[7];
	char c1, c2;
	strcpy(number, "123");
	c1 = '1';
	c2 = '3';
	while (strcmp(number,"0") != 0 || c1 != '0' || c2 != '0') {
		scanf("%s %c %c", &number, &c1, &c2);
		int nr = 0;
		for (int i = 0; i < strlen(number); i++) {

			if (number[i] == c1) {
				if (i == nr && c2 == '0') {
					nr++;
					continue;
				}
				else {
					printf("%c", c2);
				}
			}
			else {
				printf("%c",number[i]);
			}
		}

		if (nr == strlen(number)) {
			printf("0");
		}

		printf("\n");
	}
}