class Program
    {
        static void Main(string[] args)
        {
            string str = Console.ReadLine();
            int count = 0;
            int max = 0;
            for (int i = 0; i < str.Length; i++)
            {
                if (str[i] == '…')
                {
                    count++;
                }
                else
                {
                    if(count > max)
                    {
                        max = count;
                    }
                    count = 0;
                }
            }
            if (count > max)
            {
                max = count;
            }
            Console.WriteLine(max);
        }
    }