Recursive String Method Output

Consider the following RemoveVowels class. What is printed when the program is executed?

public class RemoveVowels {
    public static String remove(String s) {
        if(s.length() == 0) return "";
        if("AEIOUaeiou".indexOf(s.charAt(0)) != -1)
            return remove(s.substring(1));
        return s.charAt(0) + remove(s.substring(1));
    }
    public static void main(String[] args) {
        System.out.println(remove("Hello"));
    }
}