import java.util.*;
class Main{

  public static void main(String[] args){
	 Scanner sc = new Scanner(System.in);	
    int a = sc.nextInt();
    String s = sc.next();
    if(a >= 3200){
    	System.out.println(s);
    } else{
    	System.out.println("red");
    }
  
	}
}