import java.io.*;

public class Solution {
    public static void main(String[] args) throws Exception {

        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

        System.out.print("Дядя, вводи минутки =");
        //String aa = reader.readLine();
       // int min = Integer.parseInt(aa);
        double min = Double.parseDouble(in.readLine());

        int green=3;
        int yellow=1;
        int red=1;
        int colour =0;

        String svetofor="";
       while (colour <= min) {

           if (colour <= min) {colour=colour+ 3;
           svetofor="зелёный";}

           if (colour <= min) {colour=colour+ 1;
           svetofor="желтый";}

           if (colour <= min){ colour=colour+ 1;
           svetofor="красный";}



       }
        System.out.println(svetofor);
       }

    }