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

/**************************************************************
	Problem: 1570
	User: tangkaixuan
	Language: C++
	Result: Accepted
	Time:23 ms
	Memory:2076 kb
****************************************************************/