#include <sstream>
#include <string>
#include <iostream>

using namespace std;

int main(void)
{
   // ostringstream ostr("", ios::ate);
   int answer = 2*2;

   // ostr << "StrStream Hello World";
   // cout << ostr;

   string test="String Hello world";

   cout << test << "\n";
   
   cout << "Hello World\n" << answer;

   return 0;
}