import java.util.Scanner;
public class Hello {
	public static void main(String[] args) {
		
		Scanner scanner = new Scanner(System.in);
		String a = scanner.next();
		String b = scanner.next();
		if( a.substring(a.length()-1).equals(b.substring(b.length()-1))){
			System.out.println("Odd");
		}else{
			System.out.println("Even");
		}
	
	    scanner.close();
       
	}
}