class triangle(object):

    ntriangles = 0

    def __init__(self):
        pass

    def __str__(self):
        pass

    def circumference(self):
        pass

    def shapedata(self):
        pass



class ext_triangle(triangle):

    def __init__(self):
        pass

    def __str__(self):
        return super().__str__()

    def area(self):
        pass

    def shapedata(self):
        return super().shapedata()