new_contents: #!/usr/bin/env python3
  '''
  Each lowercase letter becomes uppercase and each uppercase letter becomes lowercase
  '''
  def to_alternating_case(string):
      return ''.join(c.lower() if c.isupper() else c.upper() for c in string)
      
  #Alternative solutions
  def to_alternating_case(string):
      return string.swapcase()
  
subject: Create AlternateCase-8k.py