#include<bits/stdc++.h>
using namespace std;
 int main(){
    string s,n,m;
    cin>>s>>n>>m;
    int p=s.find(n);
    while(p!=-1){
        s.replace(p,n.size(),m);
        p=s.find(n);
    }
    cout<<s;
    return 0;
}
/**************************************************************
	Problem: 1570
	User: xuanhua
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2076 kb
****************************************************************/