#include <algorithm>
#include <iostream>
#include <string>
using namespace std;

int main() {
	string S;
	cin >> S;
	int sum = 0, ans = 0;
	for (int i = 0; i < S.size(); i += 3) {
		if (S.substr(i, 3) == "…") ++sum;
		else {
			ans = max(sum, ans);
			sum = 0;
		}
	}
	ans = max(sum, ans);
	cout << ans;
}