using System;

public class Program

{

    public static void Main()

    {

dynamic test = 2;

test = "hello world";

Console.WriteLine(test);

Action<string> tell = (word) => Console.WriteLine(word);

Func<string, string> spell = (what) => $"hello spell {what}";

test = spell;

tell("hi you");

test("onomatopoeia");

test = tell;

test("hi");

    }

}