/* Using the Standard Set Template */

#include <string>
#include <iostream>
#include <set>

using namespace std;


int main()
{
	set<string> a;
	a.insert("beta");
	a.insert("gamma");
	a.insert("delta");
	a.insert("alpha");

	for(set <string>::iterator p = a.begin(); p != a.end(); p++)
		cout << *p << endl;
	cout << "-----------\n";
	a.erase("beta");
	for(set <string>::iterator p = a.begin(); p != a.end(); p++)
		cout << *p << endl;

	return 0;

}