#include <iostream>

// super class
using namespace std;
	
class Time
{
private:
	int hrs;
	int mins;
	int secs;
public:

	// constructors
	Time ()          // default constructor
	{
		hrs = mins = secs = 0;    // 0:0:0
	}
	Time ( int h, int m, int s )    // general constructor
	{
		hrs = h;
		mins = m;
		secs = s;
	}

	// function members
	void Set(int h, int m, int s)      // transformer
	{
		hrs = h; 
		mins = m;
		secs = s;
	}
	void Write() const                // observer
	{
		cout << hrs << ':' << mins << ':' << secs;
	}
	bool Equal ( Time x ) const   // observer
	{
		return ( hrs == x.hrs && mins == x.mins && secs == x.secs );
	}
};

// declare ZONE type ( time zone: est, pst, etc....)
enum ZoneType { EST, CST, MST, PST, EDT, CDT, PDT };

// sub class
class extTime : public Time
{
private:	// may be omitted	
	ZoneType zone;
public:
	// constructors
	extTime()	// default EST 00:00:00
	{
		zone = EST;
	}
	extTime( int h, int m, int s, ZoneType z )
	: Time( h, m, s)    // invoke the constructor of Time
	{
		zone = z;
	}
};

// DRIVER or CLIENT CODE
int main()
{
	cout << "Hi." << endl;

	return 0;
}