#include <iostream>
#include <string.h>
#include <string>
#include <conio.h>

using namespace std;

int main()
{
	string n;
	char c1, c2;
	int t = 0;

	while (t < 15)
	{
		cin >> n >> c1 >> c2;
		if (n == "0" && c1 == '0' && c2 == '0')
		{
			return 0;
		}
		else
		{
			for (long i = 0; i < strlen(n.c_str()); i++)
			{
				if (n[i] == c1)
					n[i] = c2;
			}
			cout << atoi(n.c_str());
		}
		t++;
	}

	return 0;
}