#include <algorithm>
#include <climits>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <iostream>
#include <sstream>
#include <functional>
#include <map>
#include <string>
#include <cstring>
#include <vector>
#include <queue>
#include <stack>
#include <deque>
#include <set>
#include <list>
#include <numeric>
using namespace std;
const double PI = 3.14159265358979323846;
const double EPS = 1e-12;
const int INF = 1<<25;
typedef pair<int,int> P;
typedef long long ll;
typedef unsigned long long ull;


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