AnimalType

namespace AnimalType
{
    using System;

    class AnimalType
    {
        static void Main()
        {
            var animal = Console.ReadLine().ToLower();

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