#include <bits/stdc++.h>
#define rep(i, ss, ee) for (int i = ss; i < ee; ++i)
using namespace std;

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);

  int sum = 0, ans = 0;
  string s, s2;
  cin >> s >> s2;
  s += s2;
  rep(i, 0, s.size()) {
    if (s[i] == 'o') {
      sum++;
      ans = max(ans, sum);
    } else {
      sum = 0;
    }
  }
  cout << ans << endl;
  getchar();
}