#include <bits/stdc++.h>

#define rep(i, n) for (int (i) = 0; (i) < (int)(n); (i)++)

const int dx[] = {1, 0, -1, 0};
const int dy[] = {0, 1, 0, -1};
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef pair<int, int> pii;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    string s, t;
    cin >> s;
    cin >> t;
    s = s+t;
    int ans = 0;
    int cur = 0;
    while (cur < 14) {
        int i;
        for (i = cur; i < 14; i++) {
            if (s[i] != 'o') break;
        }
        ans = max(ans, i-cur);
        cur = i+1;
    }
    cout << ans << endl;
    return 0;
}