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

int main() {
	string s1, s2;
	cin >> s1 >> s2;
	s1 += s2;
	int cnt = 0;
	int ans = 0;
	for (int i = 0; i < s1.size(); i++)
	{
		if (s1[i] == 'o'){
			cnt++;
			ans = max(cnt, ans);
		}
		else cnt = 0;
	}
	cout << ans << endl;
}