Joro The Rabbit

using System;

class JoroTheRabbit
{
    static void Main()
    {
        string[] input = Console.ReadLine().Split(new char[] { ' ', ',' }, StringSplitOptions.RemoveEmptyEntries);
        int[] valley = new int[input.Length];
        for (int i = 0; i < input.Length; i++)
        {
            valley[i] = int.Parse(input[i]);
        }

        int maxLength = 1;
        for (int step = 1; step < valley.Length; step++)
        {

            for (int startIndex = 0; startIndex < valley.Length; startIndex++)
            {
                bool[] visited = new bool[valley.Length];
                visited[startIndex] = true;
                int currentLength = 1;
                int currentIndex = startIndex + step;
                int previousNumber = startIndex;

                while (true)
                {
                    if (currentIndex > valley.Length - 1)
                    {
                        currentIndex = currentIndex % valley.Length;
                    }

                    if (currentIndex < 0)
                    {
                        break;
                    }

                    if (!visited[currentIndex] && valley[currentIndex] > valley[previousNumber])
                    {
                        visited[currentIndex] = true;
                        currentLength++;
                        previousNumber = currentIndex;

                    }
                    else
                    {
                        break;
                    }

                    currentIndex += step;

                }
                if (currentLength > maxLength)
                {
                    maxLength = currentLength;
                }
            }
        }

        Console.WriteLine(maxLength);
    }
}