12. SpeedInfo

/*
 * Simple Conditions
 */
import java.util.Scanner;

public class _12_SpeedInfo
{
    public static void main(String[] args)
    {
        Scanner console = new Scanner(System.in);

        double speed = Double.parseDouble(console.nextLine());

        // If true: speed is between 'Integer.MIN_VALUE' and 10
        // If false: speed is between 11 and 'Integer.MAX_VALUE'
        if (speed <= 10) {
            System.out.println("slow");
        }
        // If true: speed is between 11 and 50
        // If false: speed is between 51 and 'Integer.MAX_VALUE'
        else if (speed <= 50) {
            System.out.println("average");
        }
        // If true: speed is between 51 and 150
        // If false: speed is between 151 and 'Integer.MAX_VALUE'
        else if (speed <= 150) {
            System.out.println("fast");
        }
        // If true: speed is between 151 and 1000
        // if false: speed is between 1001 and 'Integer.MAX_VALUE'
        else if (speed <= 1000) {
            System.out.println("ultra fast");
        }
        // speed is between 1001 and 'Integer.MAX_VALUE'
        else {
            System.out.println("extremely fast");
        }
    }
}