#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: huanghengyi
	Language: C++
	Result: Accepted
	Time:21 ms
	Memory:2076 kb
****************************************************************/