#include <bits/stdc++.h>

using namespace std;

int main(void)
{
	cin.tie(0);
	ios::sync_with_stdio(false);

	string s1, s2;

	cin >> s1;
	cin >> s2;
	s1 += s2;

	int res = 0;
	int cnt = 0;

	for (int i = 0; i < s1.length(); i++)
	{
		if (s1[i] == 'o')
		{
			cnt++;
			res = max(res, cnt);
		}
		else
		{
			cnt = 0;
		}
	}
	res = max(res, cnt);

	cout << res << '\n';


	return 0;
}