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.
# l = [1,0,0,0,4,2,0,0,0,1,2,0,8,0,6,0,0,9,12]
# print(len(l))
# # def fun(l):
# # 	nonzero = []
# # 	zero = []
# # 	for i in l:
# # 		if(i==0):
# # 			zero.append(0)
# # 		else:
# # 			nonzero.append(i)
# # 	nonzero.extend(zero)
# # 	return nonzero
# # print(fun(l))

# def opt_fun(l):
# 	i = 0
# 	j = 0
# 	n = len(l)
# 	while(j<n):
# 		if l[j]!=0:
# 			l[i]=l[j]
# 			i+=1
# 		j+=1
# 	k= i
# 	z = j-i	

# 	while(i<n):
# 		l[i]=0
# 		i+=1
# 	nz = n-j-i
# 	print(nz)
# 	# l[n-(k//2):]=l[(k-(k//2)):k]
# 	# l[(k-(k//2)):k] = [0]*(k//2)
	
	
	


	

# 	return l
# print(opt_fun(l))


# l = input().split('+')
# print(sum(l))
s = input()
if len(set(s))%2:print("IGNORE HIM!")
else:print("CHAT WITH HER!")