public class ApplicationRunner {
    public static String CHECKING_SENTENCE = "topot";

    public static void main(String[] args) {
        System.out.println(isPalindrome(CHECKING_SENTENCE));
    }

    public static boolean isPalindrome(String sentence) {
        boolean isValid = true;
        int sentenceLength = sentence.length();
        for (int i = 0; i < sentenceLength / 2 && isValid; ++i) {
            isValid = sentence.charAt(i) == sentence.charAt(sentenceLength - i - 1);
        }
        return isValid;
    }
}