#include<bits/stdc++.h>
using namespace std;
int main(){
	string s1;
	cin>>s1;
string c1,c2;
	cin>>c1>>c2;
//	for(int i=0;i<s1.size();i++){
//		if(s1[i]==c1){
//			cout<<c2;
//		}else
//		 cout<<s1[i];
//	}
	int p=s1.find(c1);
	while(p!=-1){
		s1.replace(p,1,c2);
		p=s1.find(c1);
	} 
	cout<<s1;


	return 0;
}



/**************************************************************
	Problem: 1570
	User: hulaoshi
	Language: C++
	Result: Accepted
	Time:22 ms
	Memory:2076 kb
****************************************************************/