using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

class Program
{
	static void Main(string[] args)
	{
		new Program().Solve();
	}

	void Solve()
	{
		string s = Console.ReadLine();
		char c = '…';
		int i = 0;
		int n = s.Length;
		int ans = 0;
		while (i < n)
		{
			if (s[i] != c)
			{
				i++;
				continue;
			}
			int j = i;
			while (i < n && s[i] == c) i++;
			ans = Math.Max(ans, i - j);
		}
		Console.WriteLine(ans);
	}
}