#include <iostream>
using namespace std;

int main() {
	string x;
	char a,b;
	while(cin>>x>>a>>b)
	{
		if(a=='0' && b=='0' &&x=="0")
		break;
		for(int i=0;i<x.size();i++)
		if(x[i]==a )
		x[i]=b;
		cout<<stoi(x)<<"\n";
	}
}