using System;

public class Program

{

    public static void Main()

    {

        string month = "January";

        int length; 

        length = month.Length; 

        Console.WriteLine("{0} to {1} characters long)", month, length);

        char singleLetter;

        int whichLetter = 3;

        singleLetter = month[whichLetter];

        Console.WriteLine("Character {0} of {1} is {2}", whichLetter, month, singleLetter);

        string subString;

        int startPos = 3;

        int howMany = 2;

        subString = month.Substring(startPos, howMany);

        Console.WriteLine("Substring is {0}" , subString);

        string saying = " has 31 days.";

        string combined;

        combined = month + saying;

        Console.WriteLine("Joined string is {0}", combined);

    }

}