easyctf-2017/fizz-buzz-2/source_verifier.py

import sys                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                
code = sys.stdin.read()                                                                                                                                                                                                                                                         
                                                                                                                                                                                                                                                                                
if ("i" in code) or ("I" in code) or ("?" in code):                                                                                                                                                                                                                             
  print "Your program contains an 'i', 'I', or '?'. Please remove it and try again."                                                                                                                                                                                            
else:                                                                                                                                                                                                                                                                           
  print "OK"