#include <bits/stdc++.h>
using namespace std;
int main(){
    string s1,s2,s3;
    cin >> s1 >> s2 >> s3;
    int len=s3.size();
    while(1){
        int l=s1.find(s2);
        if(l==-1){
            break;
        }
        s1=s1.replace(l,len,s3);
    }
    cout << s1;
    return 0;
}