# conding:utf-8
class Count:
    """doc"""

    def __init__(self, a, b):
        self.a = a
        self.b = b

    def add(self):
        return self.a + self.b

    def add1(self):
        return self.a + self.b

    def sub(self):
        a = self.a - self.b
        return a

# c = Count(1, 2)
# print c.sub()
