text: """
  lecture 3
  """
  
  my_list=[1,2,3,4,5]
  print(my_list)
  
  my_nested_list=[1,2,3,my_list]
  print(my_nested_list)
  
  print(my_list[1])
  
  my_list[0]=6
  print(my_list)
  
  print(my_list[0:2])
  
  print('hello world')
  print('hello\tworld')
  print('hello\nworld')