#include <cstdio>
#include <cstring>

using namespace std;

int main() {
    char s[100];
    int c1, c2;
  //  freopen("fis.in", "r", stdin);
   // freopen("fis.out", "w", stdout);
    scanf("%s %d %d\n", s, &c1, &c2);
    while (c1 != 0 || c2 != 0 || strcmp(s, "0")) {
        for (int i = 0; i < strlen(s); i++) {
            if (s[i] == c1 + '0') {
                s[i] = c2 + '0';
            }
        }
        int i;
        for (i = 0; s[i] == '0' && i < strlen(s) - 1; i++);
        for (; i < strlen(s); i++) {
            printf("%c", s[i]);
        }
        printf("\n");
        scanf("%s %d %d\n", s, &c1, &c2);
    }
    return 0;
}