// This program demonstrates nested loops. It simulates a 24 hour clock.
#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
	cout << fixed << right;
	cout.fill('0');
	
	for (int hours = 0; hours < 24; hours++)
	{
		for (int minutes = 0; minutes < 60; minutes++)
		{
			for (int seconds = 0; seconds < 60; seconds++)
			{
				cout << setw(2) << hours << ":";
				cout << setw(2) << minutes << ":";
				cout << setw(2) << seconds << endl;
			}
		}
	}

	return 0;
}