JorroTheRabbit

using System;
using System.Text;

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

    static void JumpingArround(int[] terrain)
    {
        int steps = 0;
        for (int i = 0; i < terrain.Length; i++)
        {
            for (int g = 1; g < terrain.Length; g++)
            {
                int indexPosition = i;
                int currSteps = 1;
                while (terrain[indexPosition] < terrain[(indexPosition + g) % terrain.Length])
                {
                    currSteps++;
                    indexPosition += g;
                    if (indexPosition >= terrain.Length) indexPosition %= terrain.Length;
                }
                if (currSteps > steps) steps = currSteps;
            }
        }
        Console.WriteLine(steps);
    }
}