import java.util.*;

public class Main{
  public static void main(String[]args){
    Scanner sc = new Scanner(System.in);
      int a = new java.util.Scanner(System.in).nextInt();
      String s = new java.util.Scanner(System.in).nextLine();

      if(a>=3200){
        System.out.println(s);
      }else{
        System.out.println("red");
      }

  }
}