input: from typing import Any
  
  
  class Sum:
      def __init__(self, x: int, y: int):
          self.x = x
          self.y = y
  
      def add(self) -> int:
          """
          Calculate the sum of two integers.
  
          >>> Sum(2, 3).add()
          5
          >>> Sum(10, -5).add()
          5
          >>> Sum(0, 0).add()
          0
          """
          return self.x + self.y
output:     return self.x + self.y