#include <bits/stdc++.h>
using namespace std;
typedef unsigned long long ul;
typedef signed long long ll;
ul over = 1000000007;

int main(void)
{
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << fixed;
  string s, t;
  cin >> s >> t;
  s += t;
  int cnt = 0, cnt_max = 0;
  for (auto c : s) {
    if (c == 'o') {
      cnt++;
      cnt_max = max(cnt_max, cnt);
    } else {
      cnt = 0;
    }
  }
  cout << cnt_max << endl;
  return 0;
}