new_contents: # !/usr/bin/env python
  # coding: utf-8
  
  import this
  
  s = this.s
  d = {}
  for c in (65, 97):
      for i in range(26):
          d[chr(i + c)] = chr((i + 13) % 26 + c)
  
  print 'python 之禅'
  print "".join([d.get(c, c) for c in s])
  
subject: add zen