output_description: Print the area and perimeter of the rectangle in a line. The two integers
  should be separated by a single space.
input_description: The length a and breadth b of the rectangle are given in a line separated by a
  single space.
attempt: x = str(input())
  n = x.split(" ", 2)
  a = int(n[0])
  b = int(n[1])
  ab = a * b
  a_b = (a + b) * 2
  print("ab", end=" ")
  print("a_b")
  
problem_description: Rectangle
  
  Write a program which calculates the area and perimeter of a given rectangle.
samples: [{"input": "3 5", "output": "15 16"}]