#include "bits/stdc++.h"
using namespace std;

int main() {
	string S, S1, S2;
	int MAX = 0, count = 0;
	cin >> S1 >> S2;
	S = S1 + S2;
	for (int i = 0; i < 14; i++) {
		if (S[i] == 'o') {
			count++;
		}
		else {
			count = 0;
		}
		MAX = max(MAX, count);
	}
	cout << MAX;
}