using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        string S = Console.ReadLine();

        List<int> cntList = new List<int>();
        int cnt = 0;

        foreach (char c in S.ToCharArray())
        {
            if (c != '…')
            {
                cntList.Add(cnt);
                cnt = 0;
                continue;
            }

            cnt++;
        }
        cntList.Add(cnt);

        Console.WriteLine(cntList.Max());
    }
}