using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string s1 = "Computer MUT12345";

        Console.WriteLine("{0}",s1);

        Console.WriteLine("Length = {0}",s1.Length);

        Console.WriteLine("Uppercase = {0}",s1.ToUpper());

        Console.WriteLine("Lowercase = {0}",s1.ToLower());

        Console.WriteLine("S1[0] = {0} S1[16] = {1}",s1[0],s1[16]);

    }

}