using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Es ist schön");

    }

    internal class ClipPlaneValidator

    {

        public static bool ClipPlanesAreValid(IEnumerable<ClipPlaneSceneData> data, bool isClosedLoop)

        {

            return !ClipPlanesAreInvalid(data, isClosedLoop);

        }

​

        private static bool ClipPlanesAreInvalid(IEnumerable<ClipPlaneSceneData> data, bool isClosedLoop)

        {

            var clipPlaneSceneData = data.ToList();

            if (isClosedLoop)

            {

                clipPlaneSceneData.Add( clipPlaneSceneData.First() );

            }

​

            var dataAsCharSequence = ConvertToCharSequence(clipPlaneSceneData);

            var forbiddenPattern = "tft";

            return ContainsPattern( dataAsCharSequence , forbiddenPattern );

        }

​

        static IEnumerable<char> ConvertToCharSequence(IEnumerable<ClipPlaneSceneData> clipPlaneSceneData )

        {

            return clipPlaneSceneData.Select( item => item.IsSet ? 't' : 'f' );

        }

​

        static bool ContainsPattern(IEnumerable<char> sequence, string pattern)

        {

            return string.Join( "", sequence ).Contains( pattern );

        }

    }

}