# include <iostream>
using namespace std;

int n, c1, c2;
int main() {
    while(cin >> n >> c1 >> c2 ) {
        int inv = 0;
        int in = 0;
        if(n == 0) {
            cout << c2;
            continue;
        }
        while(n) {
            in = in * 10 + n % 10;
            n /= 10;
        }
        while(in) {
            int c = in % 10;
            if (c == c1) {
                inv = inv * 10 + c2;
            } else {
                inv = inv * 10 + c;
            }
            in /= 10;
            }
            cout << inv << "\n";
    }
}