using System;

public class Program

{

    public static void Main(string [] args)

    {

    char [] crs = {'Z','e','t','C','o','d','e'};

        String s=new String(crs);

        char c1=s[0];

        char c2=s[(s.Length - 1)];

        Console.WriteLine(c1);

        Console.WriteLine(c2);

        int i1=s.IndexOf('e');

        int i2=s.LastIndexOf('e');

        Console.WriteLine("The first index of character e is "+i1);

        Console.WriteLine("The first index of character e is "+i2);

        Console.WriteLine(s.Contains("t"));

       Console.WriteLine(s.Contains("f"));

     char [] elements=s.ToCharArray();

        foreach(char el in elements)

        {

        Console.WriteLine(el);  

    }

}}