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

//YukiCoder341 沈黙の期間
//http://yukicoder.me/problems/no/341
class Program
{
    static string InputPattern = "InputX";

    static List<string> GetInputList()
    {
        var WillReturn = new List<string>();

        if (InputPattern == "Input1") {
            WillReturn.Add("……何でもないです。");
            //2
        }
        else if (InputPattern == "Input2") {
            WillReturn.Add("………別に………");
            //3
        }
        else if (InputPattern == "Input3") {
            WillReturn.Add("……………");
            //5
        }
        else {
            string wkStr;
            while ((wkStr = Console.ReadLine()) != null) WillReturn.Add(wkStr);
        }
        return WillReturn;
    }

    static void Main()
    {
        List<string> InputList = GetInputList();
        string S = InputList[0];

        int Answer = 0;
        int SeqCnt = 0;
        for (int I = 0; I <= S.Length - 1; I++) {
            if (S[I] == '…') {
                SeqCnt++;
            }
            if (S[I] != '…' || I == S.Length - 1) {
                if (Answer < SeqCnt) Answer = SeqCnt;
                SeqCnt = 0;
            }
        }
        Console.WriteLine(Answer);
    }
}