#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <iomanip>
using namespace std;
using ll = long long;

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