import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

public class Main {

public static void main(String[] args) throws IOException {

String[] x = {"1", "2", "3", "4", "5", "6", "7", "8"};

String[] y = {"A", "B", "C", "D", "E", "F", "G", "H"};

BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

String input = reader.readLine();

String[] values = input.split("-");

if ((input.length() != 5) || (input.charAt(2) != '-')) {

System.out.println("ERROR input");

}

int positionX1 = 0, positionY1 = 0;

int positionX2 = 0, positionY2 = 0;

int position1 = 0, position2 = 0;

int z[] = {6, -6, 10, -10, 15, -15, 17, -17};

int answer = 0;

for (int i = 0; i < 8; i++) {

if (values[0].contains(y[i])) positionY1 = i + 1;

if (values[1].contains(y[i])) positionY2 = i + 1;

if (values[0].contains(x[i])) positionX1 = i + 1;

if (values[1].contains(x[i])) positionX2 = i + 1;

position1 = (positionY1 * 8) - (8 - positionX1);

position2 = (positionY2 * 8) - (8 - positionX2);

}

for (int i = 0; i < 8; i++) {

if (position1 - position2 == z[i]) answer++;

if (position2 - position1 == z[i]) answer++;

}

if (answer == 2) System.out.println("Move correct");

else System.out.println("Move invalid");

}

}