input: Write a function to change the provided Python program to print 'Happy Holidays' 10 times.
  
  def print_holidays(program):
      return program.replace("'Hello World'", "'Happy Holidays'")
  
  assert print_holidays("for i in range(10):\n    print('Hello World')")=="for i in range(10):\n    print('Happy Holidays')"
  assert print_holidays("for i in range(5): print('Hello World')")=="for i in range(5): print('Happy Holidays')"
  assert print_holidays("print('Hello World')")=='''print('Hello World')'''
  assert print_holidays("print('Hello World'*10)")=='''print('Hello World'*10)'''
  assert print_holidays("")==""
output: def print_holidays(program):
      return program.replace("'Hello World'", "'Happy Holidays'")