#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); i++)
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<ll> vll;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef vector<vector<ll>> vvll;
const ll inf = 1e16;
const ll md = 1000000007;

int main() {
  string s,t;
  cin>>s>>t;
  s+=t;
  int ans=0,cnt=0;
  rep(i,14){
    if(s[i]=='o') cnt++;
    else{
      ans=max(ans,cnt);
      cnt=0;
    }
  }
  ans=max(ans,cnt);
  cout<<ans<<endl;
  return 0;
}