using System;

class Program
{
    public static void Main()
    {
        string s = Console.ReadLine();
        int cnt = 0, max = 0;
        
        foreach (char c in s)
        {
            if (c == '…') {
                cnt++;
                if (cnt > max) max = cnt;
            }
            else cnt = 0;
        }

        Console.WriteLine(max);
    }
}