(i wrote this program and i don't knw, what the problem is, but it is running properly with the correct output and hacker rank is giving some test case errors) import java.io.; import java.util.;

public class Solution { public static boolean isPalindrome(String str){ str = str.replaceAll("\s", "").toLowerCase(); int left = 0; int right = str.length()-1;

    while(left < right){
        if (str.charAt(left) != str.charAt(right)) {
            return false;
        }
        left++;
        right--;
    }
    return true;



}

public static void main(String[] args) {

    Scanner sc=new Scanner(System.in);
    String A=sc.nextLine();

    if(isPalindrome(A)){
        System.out.println("yes");
    }
    else{
        System.out.println("no");
    }


}

}