#include 
#include 
using namespace std;


int main()
{
	set myset;
	set::iterator iter;

	myset.insert("Madras");
	myset.insert("Delhi");
	myset.insert("Bombay");
	myset.insert("Calcutta");

	cout << " The 4 main cities in India are : \n";
	for(iter = myset.begin();iter != myset.end();iter++)
	{
		cout << *iter << "\n\n";
	}
	return 0;
}