using System;

public class Program

{

    public static void Main()

    {

        string camelCase = "CamelCase";

        string newCamelCase= HiffenCamelCase(camelCase);

        Console.WriteLine(camelCase);

        Console.WriteLine(newCamelCase);

    }

    static string HiffenCamelCase(string s)

    {

        if (!String.IsNullOrEmpty(s))

        {

            string result = s[0].ToString();

            for (int i = 1; i < s.Length;i++)

            {

                result += s[i]+ (i+1<s.Length ? (Char.IsUpper(s[i+1]) ?"-" : "") : "");

            }

            return result;

        }

        else return s;

    }

}