#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main() {
	cin.tie(0); ios::sync_with_stdio(false);
	int ans = 0, temp_ans = 0;
	int pos = 0,next_pos = 0;
	int len = 0;
	string str;
	cin >> str;

	while ((next_pos = (str.find("…",pos))) != string::npos) {
		if (next_pos - pos == 1) {
			temp_ans++;
			pos = next_pos + 1;
		}
		else {
			ans = max(ans, temp_ans);
			temp_ans = 1;
			pos = next_pos + 1;
		}
	}
	ans = max(ans, temp_ans);
	cout << ans << endl;
	return 0;
}