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

int main()
{
	string s1, s2;
	cin >> s1 >> s2;

	s1 += s2;
	int ans = 0;
	int h = 0;
	for( int i = 0; i < s1.size(); i++ ) {
		if( s1[i] == 'o' ) h++;
		else h = 0;
		ans = max( ans, h );
	}

	cout << ans << endl;
}