#include <iostream>
#include <string>

using namespace std;

int main()
{
	string N;
	int C1, C2;

	cin >> N >> C1 >> C2;

	while (!(N.size() == 1 && N[0] == '0' && C1 == 0 && C2 == 0))
	{
		int size = N.size();
		for (int i = 0; i < size; i++)
		{
			if (N[i] - '0' == C1)
			{
				N[i] = C2 + '0';
			}
		}

		int i = 0;
		while (N[i] == '0' && i < size)
		{
			i++;
		}

		if (i >= size)
		{
			cout << "0" << '\n';
		}
		else
		{
			for (; i < size; i++)
			{
				cout << N[i];
			}
		}

		cout << '\n';
		cin >> N >> C1 >> C2;
	}

	return 0;
}