#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: wenda
	Language: C++
	Result: Accepted
	Time:26 ms
	Memory:2076 kb
****************************************************************/