input: 
  def fibonacci(n):
      """ Generate Fibonacci numbers using recursion.
      >>> fibonacci(1)
      1
      >>> fibonacci(2)
      1
      >>> fibonacci(10)
      55
      """
      if n == 1 or n == 2:
          return 1
      else:
          return fibonacci(n - 1) + fibonacci(n - 2)
  
output:     if n == 1 or n == 2:
          return 1
      else:
          return fibonacci(n - 1) + fibonacci(n - 2)