import java.util.Scanner;

public class Main {

	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);

		System.out.println(solve(sc.next()));

		sc.close();
	}

	public static int solve (String s) {
		int ret = 0;
		for (int i = 0; i < s.length();) {
			int cnt = 0;
			while (i < s.length() && s.charAt(i++) == '…')
				cnt++;
			ret = Math.max(ret, cnt);
			cnt = 0;
		}
		return ret;
	}

}