using System;

public class Program

{

    public static void Main()

    {

        var chars = new char[] { 'a','À','Á','Ä', '$','教','Å','1','+','ñ', '(', '❤'};

        foreach (char caracter in chars)

        {           

            Console.WriteLine(caracter + ": " + char.IsLetter(caracter));                       

        }

    }

}