#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
int main(int argc, char **argv)
{
    int a,b;
    char *str;
    char c;
    int i;

    a = 2;
    b = 1;
    str = strdup("asdf");
    while (strcmp(str, "0") != 0 || a != 0 || b != 0)
    {
    scanf("%s %d %d", str, &a, &b);
    c = a + '0';
    i = 0;
    while (str[i] != '\0')
    {
        if (str[i] == c)
            str[i] = b + '0';
        i++;
    }
    while (*str == '0')
        str++;
    if (str[0] == '\0')
        printf("0");
    else
        printf("%s\n", str);
    }
}