#include <algorithm>
#include <vector>
#include <cfloat>
#include <string>
#include <cmath>
#include <set>
#include <cstdlib>
#include <map>
#include <ctime>
#include <iomanip>
#include <functional>
#include <deque>
#include <iostream>
#include <cstring>
#include <queue>
#include <cstdio>
#include <stack>
#include <climits>
#include <sys/time.h>
#include <cctype>

using namespace std;

typedef long long ll;

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