#include<iostream>
#include<algorithm>
using namespace std;
int main(void)
{
	int i, p=0, ans[14] = {0};
	char y[20], m[7];
	cin >> y;
	cin >> m;
	for (i = 0; i < 7; i++) {
		y[7 + i] = m[i];
	}
	for (i = 0; i < 14; i++) {
		if (y[i] == 'o') {
			ans[p]++;
		}
		else {
			p++;
		}
	}
	sort(ans, ans + 14);
	cout << ans[13] << endl;


	return 0;
}