#include <iostream>

class Time
{
	int hours;
	int minutes;
	int seconds;

  public:
	explicit Time(int hh = 0, int mm = 0, int ss = 0)
		: hours(hh), minutes(mm), seconds(ss) { }

	Time operator+(Time other)
	{
		hours += other.hours;
		minutes += other.minutes;
		seconds += other.seconds;
		return *this;
	}

	friend inline std::ostream& operator<<(std::ostream& out, const Time& time)
	{ return out << time.hours << ':' << time.minutes << ':' << time.seconds; }
};

int main()
{
	Time actual(13, 30);
	Time periodo(8);
	Time pildora1 = actual + periodo;
	Time pildora2 = pildora1 + periodo;

	std::cout << "Son las " << actual << std::endl;
	std::cout << "Proxima pildora a las " << pildora1 << std::endl;
	std::cout << "Y la siguiente a las " << pildora2 << std::endl;
}