import java.util.Scanner;
public class time
{
	private int hrs, mins, secs;
	public Time()	{		hrs=0;	mins=0; secs=0;  }
	public Time(int h, int m, int s)
	{		hrs=h; mins=m;  secs=s;   }
	public void set(int h, int m, int s)
	{		hrs=h; mins=m;  secs=s;   }
	public void writeOut()
	{		System.out.print(hrs + ":" + mins + ":" + secs);	}
	public void increment()	// for 1 second
	{	secs ++;
		if(secs >= 60)
		{	secs = 0;
			mins ++;
			if(mins >= 60)
			{	mins = 0;
				hrs ++;
				if(hrs>=24)
					hrs = 0;
			}
		}
	}
	public static void main(String[] args)
	{		Scanner input = new Scanner(System.in);
			Time aTime = new Time();
			boolean go = true;

			int hh, mm, ss;

			while(go)
			{
				System.out.print("Input a time (hh:mm:ss): ");
				String str = input.next();	// hh:mm:ss
				String[] parts = str.split(":", 3);
				// convert string to integer
				hh = Integer.parseInt(parts[0]);
				mm = Integer.parseInt(parts[1]);
				ss = Integer.parseInt(parts[2]);

				aTime.set(hh, mm, ss);
				aTime.increment();		// for 1 second
				aTime.writeOut();
				System.out.print("\n\n\nContinue (y/n): ");
				String ans = input.next();
				if(ans.equalsIgnoreCase("n"))
					go = false;
			}

			System.out.println("\n\n\nDone.\n\n\n");
	}
}