import java.util.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		String s = sc.next();
		int leng = 0;
		int max = -1;
		for (int i=0; i<s.length(); i++) {
			char c = s.charAt(i);
			if (c=='…') {
				leng++;
				max = Math.max(max,leng);
			}
			else {
				leng = 0;
			}
		}
		System.out.println(max==-1?0:max);
	}
}