import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.StringTokenizer;

public class MorseCodePalindrome {

    static BufferedReader br;
    static PrintWriter out;
    static StringTokenizer st;

    public static void main(String[] args) throws IOException {
        br = new BufferedReader(new InputStreamReader(System.in));
        out = new PrintWriter(new OutputStreamWriter(System.out));

        String[] english = { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l",
                "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x",
                "y", "z", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
        };

        String[] morse = { ".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", "..",
                ".---", "-.-", ".-..", "--", "-.", "---", ".--.", "--.-", ".-.",
                "...", "-", "..-", "...-", ".--", "-..-", "-.--", "--..", "-----", ".----",
                "..---", "...--", "....-", ".....", "-....", "--...", "---..", "----.",
        };

        String input = readLine().toLowerCase();
        StringBuilder mInp = new StringBuilder();

        for (int i = 0; i < input.length(); i++) {
            char c = input.charAt(i);
            if (Character.isLetterOrDigit(c)) {
                for (int j = 0; j < english.length; j++) {
                    if (english[j].charAt(0) == c) {
                        mInp.append(morse[j]);
                        break;
                    }
                }
            }
        }

        if (mInp.length() == 0) {
            out.println("NO");
        } else {
            boolean isPalindrome = true;
            int len = mInp.length();
            for (int i = 0; i < len / 2; i++) {
                if (mInp.charAt(i) != mInp.charAt(len - i - 1)) {
                    isPalindrome = false;
                    break;
                }
            }

            if (isPalindrome) {
                out.println("YES");
            } else {
                out.println("NO");
            }
        }

        out.close();
    }

    static String next() throws IOException {
        while (st == null || !st.hasMoreTokens())
            st = new StringTokenizer(br.readLine().trim());
        return st.nextToken();
    }

    static long readLong() throws IOException {
        return Long.parseLong(next());
    }

    static int readInt() throws IOException {
        return Integer.parseInt(next());
    }

    static double readDouble() throws IOException {
        return Double.parseDouble(next());
    }

    static char readCharacter() throws IOException {
        return next().charAt(0);
    }

    static String readLine() throws IOException {
        return br.readLine().trim();
    }
}