input: def Calculator():
      """Construct a class in Python which implements two methods to add two numbers.
      >>> calculator = Calculator()
      >>> result = calculator.add_two_numbers(1, 2)
      >>> print(result)
      3
      >>> calculator.add(1, 2, 3)
      6
      """
  
      def __init__(self):
          pass
      
      def add_two_numbers(self, a, b):
          return a + b
  
      def add(self, a, b, c):
          return a + b + c
output:     def __init__(self):
          pass
      
      def add_two_numbers(self, a, b):
          return a + b
  
      def add(self, a, b, c):
          return a + b + c