#include <iostream>
#include <cstring>
#include <cstdlib>
using namespace std;

char c1, c2;
string s;
int main()
{
    while(cin >> s >> c1 >> c2)
    {
        for(int i = 0; i < s.size(); i++)
        {
            if(s[i] == c1) s[i] = c2;
        }
        if(s == "0" && c1 == '0' && c2 == '0')
        {
            break;
        }
        else
        {
            cout << atoi(s.c_str());
        }
    }
}