// editor3
import java.util.*;
public class main{
    public static void main(String[]args){
        Scanner S=new Scanner(System.in);
        if(!S.hasNextInt()){
        int n=S.nextInt();
        if(n<0){
        System.out.println("Invalid input");
        return;
        }
        }
        int sum=0;
        while(n<0){
            int rem=(n%10);
            sum=sum+rem;
            n=n/10;
        }
        if(sum%2==0){
            System.out.println("Even");
        }
        else{
            System.out.println("Odd");
        }
    }
}