Animal Type

using System;

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;
         }
    }
}