A. Boy or Girl
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

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.

Input

The first line contains a non-empty string, that contains only lowercase English letters — the user name. This string contains at most 100 letters.

Output

If it is a female by our hero's method, print "CHAT WITH HER!" (without the quotes), otherwise, print "IGNORE HIM!" (without the quotes).

Examples
Input 
wjmzbmr
Output 
CHAT WITH HER!
Input 
xiaodao
Output 
IGNORE HIM!
Input 
sevenkplus
Output 
CHAT WITH HER!
Note

For the first example. There are 6 distinct characters in "wjmzbmr". These characters are: "w", "j", "m", "z", "b", "r". So wjmzbmr is a female and you should print "CHAT WITH HER!".

#include<cstdio>
#include<cmath>
#include<iostream>
#include<algorithm>
#include<cstring>
#include<cstdlib>
using namespace std;
int main()
{
    int j,n,i;
    char a[105];
    while(~scanf("%s",a))
    {
      n=strlen(a);
      sort(a,a+n);
      i=unique(a,a+n)-a;//unique()去重函数 
      if(i%2==0)
        printf("CHAT WITH HER!\n");
      else printf("IGNORE HIM!\n");
    }return 0;
}

去重不是删除，unique(a,a+n)返回的是num去重后的尾地址，之所以说比不真正把重复的元素删除，其实是，该函数把重复的元素一到后面去了，然后依然保存到了原数组中，然后返回去重后最后一个元素的地址，因为unique去除的是相邻的重复元素，所以一般用之前都会要排一下序。