Those days, many boys use beautiful girls' photos as avatars in forums. So it is pretty hard to tell the gender of a user at the first glance. Last year, our hero went to a forum and had a nice chat with a beauty (he thought so). After that they talked very often and eventually they became a couple in the network. 

But yesterday, he came to see "her" in the real world and found out "she" is actually a very strong man! Our hero is very sad and he is too tired to love again now. So he came up with a way to recognize users' genders by their user names.

This is his method: if the number of distinct characters in one's user name is odd, then he is a male, otherwise she is a female. You are given the string that denotes the user name, please help our hero to determine the gender of this user by his method.
The first line contains a non-empty string, that contains only lowercase English letters — the user name. This string contains at most 100 letters.
import sys

stdin_fileno = sys.stdin
x = ''
for line in sys.stdin:
    if line.rstrip() == 'q':
        break
    x += line
  
input = x
unique_letters = []
for letter in input:
  dupe = False
  if len(unique_letters) == 0:
    unique_letters.append(letter)
  else:
    for character in unique_letters:
      if character == letter:
        dupe = True
    if not dupe:
      unique_letters.append(letter)
unique_letters.pop()

if len(unique_letters) % 2 == 0:
  output = 'CHAT WITH HER!'
else:
  output = 'IGNORE HIM!'

stdout_fileno = sys.stdout
stdout_fileno.write(output + '\n')