using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

class Magatro
{
    static void Main()
    {
        string s = Console.ReadLine();
        int max = 0;
        bool st = false;
        int counter = 0;
        for(int i = 0; i < s.Length; i++)
        {
            if(s[i]== '…')
            {
                if (!st)
                {
                    st = true;
                    counter = i;
                }
            }
            else
            {
                if (st)
                {
                    st = false;
                    max = Math.Max(max, i - counter);
                }
            }
        }
        if (st)
        {
            max = Math.Max(max, s.Length - counter);
        }
        Console.WriteLine(max);
    }

}