#include<bits/stdc++.h>
using namespace std;
int main()
{
char string[100];
cin>>string;
int count;
for(int i = 0; i < strlen(string); i++) {
count = 1;
for(int j = i+1; j < strlen(string); j++) {
if(string[i] == string[j] && string[i] != ' ') {
count++;
//Set string[j] to 0 to avoid printing visited character
string[j] = '0';
}
}
if(count > 1 && string[i] != '0')
count--;
}
//Displays the total number of characters present in the given string
if(count % 2==0)
{
cout<<"CHAT WITH HER!";
}
else{
cout<<"IGNORE HIM!";
}
return 0;
}
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