input: Write a python function to calculate the sum and product of two numbers using the given classes.
  assert Client("Comp").sum(2, 6) == 14
  assert Client("Comp").sum(3, 5) == 20
  assert Client("Comp").sum(1, 1) == 2
output: class Adder:
      def __init__(self, name):
          self.name = name
  
      def add(self, x, y):
          return x + y
  
  class Multiplier:
      def __init__(self, name):
          self.name = name
  
      def multiply(self, x, y):
          return x * y
  
  class Client:
      def __init__(self, name):
          self.adder = Adder(name)
          self.multiplier = Multiplier(name)
  
      def sum(self, x, y):
          return self.adder.add(x, y) + self.multiplier.multiply(x, y)