#include <bits/stdc++.h>
using namespace std;
 
int main() {
	set<char>st;
	string s;
	cin >> s;
	int n = s.size();
	for(int i =0;i<n;i++){
		st.insert(s[0]);
	}
	int f = st.size();
	if(f %2==0){
		cout << "CHAT WITH HER!" << endl;
	}
	else{
		cout << "IGNORE HIM!" << endl;
	}
	return 0;
}
				I2luY2x1ZGUgPGJpdHMvc3RkYysrLmg+CnVzaW5nIG5hbWVzcGFjZSBzdGQ7CgppbnQgbWFpbigpIHsKCXNldDxjaGFyPnN0OwoJc3RyaW5nIHM7CgljaW4gPj4gczsKCWludCBuID0gcy5zaXplKCk7Cglmb3IoaW50IGkgPTA7aTxuO2krKyl7CgkJc3QuaW5zZXJ0KHNbMF0pOwoJfQoJaW50IGYgPSBzdC5zaXplKCk7CglpZihmICUyPT0wKXsKCQljb3V0IDw8ICJDSEFUIFdJVEggSEVSISIgPDwgZW5kbDsKCX0KCWVsc2V7CgkJY291dCA8PCAiSUdOT1JFIEhJTSEiIDw8IGVuZGw7Cgl9CglyZXR1cm4gMDsKfQ==