old_contents: #!/usr/bin/env python
  
  import sys
  from rubikscolorresolver import get_cube_layout
  
  print(get_cube_layout(int(sys.argv[1])))
  
new_contents: #!/usr/bin/env python3
  
  import sys
  from rubikscolorresolver import get_cube_layout
  
  print(get_cube_layout(int(sys.argv[1])))
  
subject: Update utils/print-cube-layout.py to python3