using System;
using System.Linq;

class No341
{
    static void Main(){
        var str = Console.ReadLine();
    var max = 0;
    var count = 0;
        foreach(var c in str){
            if(c=='…')count++;
            else{
                if(max<count)max=count;
                count=0;
            }
        }
        Console.WriteLine(max);
    }
}