#include <iostream>
#include <sstream>
using namespace std;
int main()
{
string s, a, b;
getline(cin, s);
cin >> a >> b;
stringstream ssin(s); //将字符串初始化为字符串流,初始化后ssin等价于cin,用法相同
string str;
while (ssin >> str)
if (str == a) cout << b<< ' ';
else cout << str << ' ';
return 0;
}