using System;

class Program
{
    static void Main(string[] args)
    {
        var S = Console.ReadLine();
        int l = 0, m = 0;
        foreach (var c in S)
            if (c == '…') {
                l++;
            } else {
                if (m < l)
                    m = l;
                l = 0;
            }
        if (m < l)
            m = l;
        Console.WriteLine("{0}", m);
    }
}