using System;

public class Test
{
	public static void Main()
	{
		var str = Console.ReadLine();
		
		int cnt = 0;
		int max = 0;
		foreach (var i in str)
		{
			if(i == '…')
			{
				cnt++;
				if (max <= cnt) max = cnt;
			}
			else cnt = 0;
		}
		Console.WriteLine(max);
	}
}