#include <bits/stdc++.h>
#define fastIO (cin.tie(0), cout.tie(0), ios::sync_with_stdio(false))
using namespace std;

int main() {
  fastIO;

  string f, s;
  cin >> f >> s;
  f += s;

  int maxv = 0, cur = 0;
  for (const auto day : f) {
    if (day == 'o') {
      cur++;
      maxv = max(maxv, cur);
    } else {
      cur = 0;
    }
  }

  cout << maxv << '\n';
  return 0;
}