Animal Type

using System;
using System.ComponentModel.Design;
using System.Globalization;
using System.Reflection;
using System.Security.Cryptography;

namespace SomeExcercises
{
    class Program
    {
        static void Main(string[] args)
        {
            string animal = Console.ReadLine();

            switch (animal)
            {
                case "dog":
                    Console.WriteLine("mammal");
                    break;
                case "snake":
                case "crocodile":
                case "tortoise":
                    Console.WriteLine("reptile");
                    break;
                default:
                    Console.WriteLine("unknown");
                    break;

            }


        }

    }
}