Speed information

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Globalization;

namespace ConsoleApp9
{
    class Program
    {
        static void Main(string[] args)
        {
            double speed = double.Parse(
                Console.ReadLine());

            if (speed > 1000)
                Console.WriteLine("extremely fast");

            else if (speed > 150 | speed == 1000)
                Console.WriteLine("ultra fast");

            else if (speed > 50 | speed == 150)
                Console.WriteLine("fast");

            else if (speed <= 10)
                Console.WriteLine("slow");

            else if (speed > 10 | speed == 50)
                Console.WriteLine("average");

        }
    }
}