#include <iostream>
#include <string>
using namespace std;
int main(){
	string S;
	cin >> S;
	int N = S.size();
	int ans = 0;
	int c = 0;
	for (int i = 0; i < N; i++){
		if (S[i] == '…'){
			c++;
			ans = max(ans, c);
		} else {
			c = 0;
		}
	}
	cout << ans << endl;
}