using NUnit.Framework;

using System;

public static class Robber

{

    public const string C = "bcdfghjklmnpqrstvwxyz";

    public static string Decode(string s)

    {

        if (s.Length < 1)

            return s;

        var t = s[0].ToString();

        var u = t.ToLower();

        return t + (s.Length > 2 && C.Contains(u) && s.Substring(0, 3) == t + "o" + u ? Decode(s.Substring(3)) : Decode(s.Substring(1)));

    }

    public static string Encode(string s)

    {

        if (s.Length < 1)

            return s;

        var t = s[0].ToString();

        var u = t.ToLower();

        return t + (C.Contains(u) ? "o" + u : "") + (s.Length > 1 ? Encode(s.Substring(1)) : "");

    }

}

​

public class RobberTests

{

    public void DecodeTest1()

    {

        Assert.AreEqual("Rövarspråket", Robber.Decode("Rorövovarorsospoproråkoketot"));

    }

    public void DecodeTest2()

    {

        Assert.AreEqual("Jag talar rövarspråket.", Robber.Decode("Jojagog totalolaror rorövovarorsospoproråkoketot."));

    }

    public void EncodeTest1()

    {

        Assert.AreEqual("Rorövovarorsospoproråkoketot", Robber.Encode("Rövarspråket"));

    }

    public void EncodeTest2()

    {

        Assert.AreEqual("Jojagog totalolaror rorövovarorsospoproråkoketot.", Robber.Encode("Jag talar rövarspråket."));

    }

}

​

public class TestRunner

{

    public static void Main()

    {

        var robberTests = new RobberTests();

        var methods = typeof(RobberTests).GetMethods();

​

        foreach (var method in methods)

        {

            if (method.DeclaringType == typeof(object)) continue;

            try

            {

                method.Invoke(robberTests, null);

                Console.WriteLine("pass {0}", method.Name);

            }

            catch (Exception e)

            {

                Console.WriteLine("fail {0}", method.Name);

                Console.WriteLine(e.Message);

                if (e.InnerException != null)

                {

                    Console.WriteLine(e.InnerException.Message);

                }

            }

        }

        Console.ReadLine();

    }

}