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

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

    def __gt__(self, other):
        """overloading the GreaterThan operator"""
        selfminutes = self.hour * 60 + self.min
        otherminutes = other.hour * 60 + other.min
        return selfminutes > otherminutes


class TimeUK(Time):
    """Derived (or inherited class)"""

    def __str__(self):
        """overloading the str operator (STRing)"""
        if self.hour < 12:
            ampm = "am"
        else:
            ampm = "pm"

        return f"[ {self.hour%12:2}:{self.min:02} {ampm}]"


if __name__ == "__main__":
    t3 = TimeUK(15, 45)
    print(f"TimeUK object = {t3}")
    t4 = Time(16, 15)
    print(f"Time   object = {t4}")
    print("compare t3 and t4: ")
    if t3 > t4:
        print("t3 is greater than t4")
    else:
        print("t3 is not greater than t4")