input: from typing import List
  
  
  def designs_positive_feedback_loop(program: str) -> str:
      """Given a Python program, design a positive feedback loop that modifies the
      program.
      
      Example:
      for designs_positive_feedback_loop('''
      for i in range(10):
          print("hello")
      ''') == '''
      for i in range(10):
          print("hello")
          i += 1
          if i == 10:
              print("You've got it!")
      '''
      """
      
      return program.strip() + "\n    i += 1\n    if i == 10:\n        print(\"You've got it!\")"
output:     lines = program.strip().split('\n')
      for i, line in enumerate(lines):
          if 'for i in range(10):' in line:
              lines[i] = line + "\n    i += 1\n    if i == 10:\n        print(\"You've got it!\")"
              break
      return '\n'.join(lines)