题解 | #重载运算#

class Coordinate():
    def __init__(self,a, b):
        self.a = a
        self.b = b
    def add(self, t):
        x = self.a + t.a
        y = self.b + t.b
        return (x, y)
a1, b1 = map(int, input().split())
a2, b2 = map(int, input().split())
C1 = Coordinate(a1, b1)
C2 = Coordinate(a2, b2)
print(C1.add(C2))