import java.io.*;
import java.util.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        long a = sc.nextLong();
        long b = sc.nextLong();
        if (isSquare(getGCD(a, b))) {
            System.out.println("Odd");
        } else {
            System.out.println("Even");
        }
    }
    
    static long getGCD(long a, long b) {
        if (b == 0) {
            return a;
        } else {
            return getGCD(b, a % b);
        }
    }
    
    static boolean isSquare(long x) {
        long left = 0;
        long right = Integer.MAX_VALUE;
        while (right - left > 1) {
            long m = (left + right) / 2;
            if (m * m <= x) {
                left = m;
            } else {
                right = m;
            }
        }
        return left * left == x;
    }
}
class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}