import java.util.Scanner;
public class Palindrome {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
String str = scan.nextLine();
StringBuffer sb = new StringBuffer(str);
sb.reverse();
if (str.equals(sb.toString())) {
System.out.println(str+" 是回文!");
}else
System.out.println(str+" 不是回文!");
}
}