boy.java

import java.util.*;

public class boy {
    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        int unique = 0;
        for (int i = 0; i < s.length(); i++) {
            boolean isUnique = true;
            for (int j = 0; j < i; j++) {
                if (s.charAt(i) == s.charAt(j)) {
                    isUnique = false;
                    break;
                }
            }
            if (isUnique) unique++;
        }
        if (unique % 2 == 0)
            System.out.println("CHAT WITH HER!");
        else
            System.out.println("IGNORE HIM!");
        sc.close();
    }
}