import static java.lang.System.*;
import java.util.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		String s = sc.next();
		List<String> list = Arrays.asList(s.split("[^…]"));
		list.sort(Comparator.comparingInt(String::length).reversed());
		out.println(list.size()==0?0:list.get(0).length());
	}
}