#include <cstdio>
#include <iostream>
#include <string>
using namespace std;

int main() {

    int N;
    //cin>>N;
    int NR;
    char c1, c2;
    int AUX;
    NR = 1;
    c1 = 1; c2 = 1;
    string s1;
    string s2;
    while (NR != 0 || c1 != '0' || c2 != '0') {
        cin>>NR>>c1>>c2;
        if (NR != 0 || c1 != '0' || c2 != '0') {
        /*int put = 1;
        while (NR / put != 0) {
            if ((NR /put) % 10 == c1) {
                NR = ((NR/(put*10))*10 + c2) * put + (NR % put);
            }
            //cout<<NR<<" "<<put<<"\n";
            put *= 10;
        }*/
        s1 = "";
        while (NR != 0) {
            s1+=(NR % 10 ) + 48;
            NR /= 10;
        }
        //cout<<"s1: "<<s1<<"\n";
        s2 = "";
        for (int i = s1.length()-1; i>=0; --i) {
            s2+=s1[i];
        }
        //cout<<"S2 :"<<s2<<"\n";
        NR = 0;
        //c1+=48;
        //c2+=48;
        for (int i = 0; i<s2.length(); ++i) {
            if (s2[i] == c1) {
                s2[i] = c2;
                //cout<<"MLC";
            }
            NR = NR * 10 +(s2[i] - 48);
        }

        cout<<NR<<"\n";
        }
    }
}