class Time(object):
    def __init__(self, hour, min):
        self.hour = hour
        self.min = min

    def __str__(self):
        """overloading the str operator (STRing)"""
        return "[ {:2}:{:02} ]".format(self.hour, self.min)

    def __repr__(self):
        """overloading the repr operator (REPResentation)"""
        return "Time(%2d,%2d)" % (self.hour, self.min)

    def __gt__(self, other):
        """overloading the GreaTer operator"""
        selfminutes = self.hour * 60 + self.min
        otherminutes = other.hour * 60 + other.min
        if selfminutes > otherminutes:
            return True
        else:
            return False

    def __add__(self, other):
        hour = self.hour + other.hour
        minute = self.min + other.min
        while minute > 60:
            minute = minute - 60
            hour = hour + 1
        while hour > 24:
            hour = hour - 24
        return self.__class__(hour, minute)




class TimeUK(Time):
    """Derived (or inherited class)"""
    def __str__(self):
        """overloading the str operator (STRing)"""
        if self.hour < 12:
            ampm = "am"
        else:
            ampm = "pm"
        print("Time representation = {}".format(Time.__str__(self)))

        return "[{:2}:{:02}{}]".format(self.hour % 12,
                                      self.min, ampm)


if __name__ == "__main__":
    t1 = Time(11, 45)
    t2 = Time(10, 20)
    print("The sum of t1 and t2 is")
    t3 = t1 + t2
    print(t3)