#include <cstring>
#include <cstdio>
char n[100];
int c1, c2;

int main () {


    while (true) {

        scanf("%s %d %d", n, &c1, &c2);
        if (n[0] == '0' && n[1] == NULL && c1 == 0 && c2 == 0)
            return 0;
        for (int i=0; i<strlen(n); ++i) {
            if (n[i] == c1+'0')
                n[i] = c2+'0';
        }
        int offset = 0;
        for (int i=0; ;++i) {
            if (n[i] != '0')
                break;
            offset++;
        }
        if (offset == strlen(n))
            printf("0\n");
        else
            printf("%s\n", n+offset);
    }

    return 0;
}