public class Ex4 {
    public static void main(String[] args) {

        String word = "kayak";

        char[] palindrome = new char[word.length()];

        for (int i = 0; i < word.length(); i++) {
            palindrome[i] = word.charAt(i);

        }

        int isPalindrome = 0; //true - 0, false - 1
        int sumPalindrome = 0;
        for (int i = 0; i < word.length(); i++) {

            if (palindrome[i] == palindrome[word.length() - 1 - i]) {
                isPalindrome = 0;
            } else {
                isPalindrome = 1;
            }

            sumPalindrome += isPalindrome;
        }


        if (sumPalindrome == 0 && word.length() > 0) {
            System.out.println("Palindrome.");
        } else {
            System.out.println("Not a palindrome.");
        }

    }
}