import java.util.Scanner;

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

		String s = sc.next(), t = "…";
		int n = 0;
		while (s.indexOf(t) >= 0) {
			n++;
			t += "…";
		}
		System.out.println(n);
	}
}