#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define endl "\n"
#define rep(i, a, n) for (int i = a; i < n; ++i)

int main() {
    string c1, c2;
    cin >> c1 >> c2;
    c1 += c2;

    int ans = 0;
    int cnt = 0;
    rep(i, 0, 14) {
        if (c1[i] == 'o') cnt++;
        else cnt = 0;
        ans = max(ans, cnt);
    }
    cout << ans << endl;

    return 0;
}