JoroTheRabbit

import java.io.ByteArrayInputStream;
import java.util.Scanner;

public class JoroTheRabbit {
    static void fakeInput() {
        String test = "1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 0";
        System.setIn(new ByteArrayInputStream(test.getBytes()));
    }

    public static void main(String[] args) {
        //fakeInput();
        Scanner scanner = new Scanner(System.in);

        String[] array = scanner.nextLine().split(", ");
        int[] numbers = new int[array.length];

        for (int i = 0; i < numbers.length; i++) {
            numbers[i] = Integer.parseInt(array[i]);
        }

        int currentLength = 1;
        int maxLength = 0;
        int index = 0;

        int nextPosition = 0;


        for (int startIndex = 0; startIndex < numbers.length; startIndex++) {
            for (int step = 1; step < numbers.length; step++) {

                index = startIndex;
                currentLength = 1;
                nextPosition = (index + step) % numbers.length;


                while (nextPosition != startIndex && numbers[nextPosition] > numbers[index]) {
                    currentLength++;
                    index = nextPosition;
                    nextPosition = (index + step) % numbers.length;
                }

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

        }
        System.out.println(maxLength);
    }

}