#include <iostream>
using namespace std;
int main() {
string s,vow="aiueo";int x;
cin>>s;x=s.length();
for(int i=0;i<s.length();i++){
for(int j=0;j<5;j++){
if(s[i]==vow[j])x--;
}
}
if(x%2==0)cout<<"IGNORE HIM!";
else cout<<"CHAT WITH HER!";
return 0;
}
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