// Page 146-148

public class TimeType
{
	private int hrs;
	private int mins;
	private int secs;
	public void set(int h, int m, int s)
	{
		hrs = h;
		mins = m;
		secs = s;
	}
	public void writeOut()
	{
		if (hrs < 10)
			System.out.print("0");
		System.out.print(hrs + ":");
		if (mins < 10)
			System.out.print("0");
		System.out.print(mins + ":");
		if ( secs < 10 )
			System.out.print("0");
		System.out.print(secs);
	}
	void increment ()
	{
		secs ++;
		if (secs > 59)
		{
			secs = 0;
			mins ++;
			if (mins > 59)
			{
				mins = 0;
				hrs ++;
				if (hrs > 23)
					hrs = 0;
			}
		}
	}
	boolean equal (TimeType t)
	{
		return (hrs==t.hrs && mins==t.mins && secs==t.secs);
	}
	public static void main(String[] args)
	{
		TimeType x = new TimeType();
		TimeType now = new TimeType();
		x.set(8, 30, 1);
		now.set(8, 30, 2);
		x.increment();

		if (x.equal (now))
			System.out.println("Good.\n");
		else
			System.out.println("Error.\n");
	}

}