public class Lab11 {
    public static String reverse(String s) {
    }
    
    public static boolean isPalindrome(String s) {
    }
    
    public static void main(String[] args) {
        System.out.println(reverse("abcdefghijklmnopqrstuvwxyz"));
        System.out.println(isPalindrome("abccba"));
        System.out.println(isPalindrome("this is not a palindrome"));
        System.out.println(isPalindrome("abcba"));
        Tree t = new Tree(15, new Tree(10, new Tree(5, null, null),
                                           new Tree(13, null, null)),
                              new Tree(20, new Tree(17, null, null),
                                           new Tree(25, null, null)));
        t.inorderPrint();
    }
}