using System;

namespace No341_1{
    public class Program{
        public static void Main(string[] args){
            var str = Console.ReadLine();
            var cnt = 0;
            var ans = 0;

            foreach(var c in str){
                if(c == '…'){
                    cnt++;
                }else{
                    ans = Math.Max(ans, cnt);
                    cnt = 0;
                }
            }

            Console.WriteLine(Math.Max(ans, cnt));
        }
    }
}