using System.Collections.Generic;
public static void Main()
Console.WriteLine("Hello World");
string[] Animals = {"Dog", "Cat", "Fish", "Rabbit"};
int AnimalsLength = Animals.Length;
Console.WriteLine(AnimalsLength);
Console.WriteLine(Animals[3]);
List<String>animals = new List<String>{"Dog"};
int animalsLength = animals.Count;
Console.WriteLine(animalsLength);
animalsLength = animals.Count;
Console.WriteLine(animalsLength);
Stack<String>Animals2 = new Stack<String>();
int Animals2Length = Animals2.Count;
Console.WriteLine(Animals2Length);
Console.WriteLine(Animals2.Peek());
Console.WriteLine(Animals2.Pop());
Console.WriteLine(Animals2.Peek());
Console.WriteLine(Animals2.Peek());
Queue<String>animals2 = new Queue<String>();
animals2.Enqueue("Rabbit");
animals2.Enqueue("Fish");
animals2.Enqueue("Parrot");
int animals2Length = animals2.Count;
Console.WriteLine(animals2Length);
Console.WriteLine(animals2.Peek());