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

int main() {
    string s, s2;
    cin >> s >> s2;
    s += s2;
    int cnt = 0;
    int ans = 0;
    for (char c : s) {
        if (c == 'o') cnt++;
        else cnt = 0;
        ans = max(ans, cnt);
    }
    cout << ans << endl;
}