#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;

char number[21];
int c1, c2, N;

int main(){

while(1){

    N = 0;

    scanf("%s", number);
    scanf("%d %d", &c1, &c2);

    int len = strlen(number);

    if(len == 1 && number[0] == '0' && c1 == 0 & c2 == 0){
        break;
    }
    for(int i = 0; i < len; i++){
        if(number[i] == c1 + '0'){
            number[i] = c2 + '0';
        }
    }
    for(int i = 0; i < len; i++){
        N *= 10;
        N += number[i] - '0';
    }printf("%d\n", N);
}
return 0;
}