old_contents: # 0
  print('No.0 choznerol')
  
  # 1
  print('No.1 ???')
  
  # 2
  print('No.2 ???')
  
  # 3
  print('No.3 ???')
  
  # 4
  print('No.4 ???')
  
  # 5
  print('No.5 ???')
  
  # 6
  print('No.6 ???')
  
  # 7
  print('No.7 ???')
  
  # 8
  print('No.8 ???')
  
  # 9
  print('No.9 ???')
  
  # 10
  print('No.10 ???')
new_contents: # 0
  print('No.0 choznerol-2')
  
  # 1
  print('No.1 ???')
  
  # 2
  print('No.2 ???')
  
  # 3
  print('No.3 ???')
  
  # 4
  print('No.4 ???')
  
  # 5
  print('No.5 ???')
  
  # 6
  print('No.6 ???')
  
  # 7
  print('No.7 ???')
  
  # 8
  print('No.8 ???')
  
  # 9
  print('No.9 ???')
  
  # 10
  print('No.10 ???')
  
subject: add choznerol-2