Codeforces Boy or Girl cu SET

boyorgirl.java

public class Main {
	
	//Maarriaa
     public static int CountDistinctChars(String s) {

        Set<Character> set = new HashSet<>();//caracterele vor fi distincte

        for(char c : s.toCharArray()) {//m, a, 

            set.add( c );//m//a//
        }

        return set.size();//mari
     }


     public static void main(String[] args) {
 

            Scanner sc = new Scanner(System.in);

            String user = scanner.next();

            boolean isGirl = countDistinctChars(user) % 2 == 0;

            System.out.println(isGirl ? "CHAT WITH HER!":"IGNORE HIM!")

     }


}