import java.util.*;

public class Main {
    private static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
        String s = sc.next();
        int ret = 0;
        int tmp = 0;
        for (int i = 0;i < s.length();i++) {
            if (s.substring(i, i+1).equals("…")) {
                tmp++;
            } else {
                tmp = 0;
            }
            ret = Math.max(ret, tmp);
        }
        System.out.println(ret);
    }
}