#include<iostream>
#include<sstream>
using namespace std;
int main(){
    string s,a,b;
    getline(cin,s);
    cin>>a>>b;
    stringstream ssin(s);//讲字符串s初始化为字符串流
    string str;
    while(ssin>>str){//讲ssin当cin用
        if(str==a) cout<<b<<" ";
        else cout<<str<<" ";
    }


    return 0;
}