import java.util.Scanner;

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