题目链接:https://nanti.jisuanke.com/t/T1109
https://nanti.jisuanke.com/t/T1109
//
// Created by Leo Lee on 2019/4/5.
//
#include <iostream>
#include <string>
using namespace std;
int main(){
string str;
char sor,tar;
cin>>str;
cin>>sor>>tar;
for(char c:str){
if(c==sor)
cout<<tar;
else
cout<<c;
}
return 0;
}