03. Animal Type

using System;

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

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