using System;

class Program
{
    static void Main()
    {
        string s = Console.ReadLine();
        int cnt = 0, ans = 0;
        foreach (var item in s)
        {
            if (item == '…')
            {
                ans = Math.Max(ans, ++cnt);
            }
            else
            {
                cnt = 0;
            }
        }
        Console.WriteLine(ans);
    }
}