# Python3
def to_ascii(h):
    strs = ""
    for i in range(len(h)//2):
  strs += chr(int(h[(i*2):(i*2)+2], 16))
    return strs

def to_hex(s):
    strs = ""
    for i in range(len(s)):
  strs += "%x"%(ord(s[i]))
    return strs

def crypt(message):
    for i, v in enumerate(message):
  message = message[:i] + chr(ord(v)-12) + message[i+1:]
    return to_hex(message)

def de_crypt(message):
    message = to_ascii(message)
    for i, v in enumerate(message):
  message = message[:i] + chr(ord(v)+12) + message[i+1:]
    return message

crypted = crypt("Crypted_String")
print(de_crypt(crypted))