#include <string>
#include <iostream>

using namespace std;

int main(){
	string s;
	char c1, c2;
	bool prva;
	
	while(!cin.eof()){
		cin>>s>>c1>>c2;
		if(cin.eof()){
			break;
		}
		if(c1 == c2){
			if(c1 != '0'){
				cout<<s;
			}
			else{
				cout<<'\n';
			}
			continue;
		}
		prva = true;
		for(int i=0; i<(int)s.size(); i++){
			if(s[i] == c1){
				if(prva == true){
					prva = false;
					if(c2 != '0'){
						cout<<c2;
					}
				}
				else{
					cout<<c2;
				}
			}else{
				cout<<s[i];
			}
		}
	}
	return 0;
}