#include <bits/stdc++.h>

using namespace std;

int main() {
  string s, t;
  cin >> s >> t;
  s += t;
  int ans = 0, cnt = 0;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == 'o')
      cnt++;
    else
      cnt = 0;
    ans = max(ans, cnt);
  }
  cout << ans << endl;

  return 0;
}