#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
#define ALL(A) A.begin(), A.end()

using namespace std;

typedef long long ll;
typedef pair<int, int> P;

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	string C1, C2; cin >> C1 >> C2;
	string C = C1 + C2;
	int n = C.length();

	int res = 0;
	for (int i = 0; i < n; ++i){
		for (int j = i; j < n; ++j){
			string curr = C.substr(i, j - i + 1);
			string ALL_HOLIDAYS = string(j - i + 1, 'o');
			if (curr == ALL_HOLIDAYS){
				res = max(res, j - i + 1);
			} // end if
		} // end for
	} // end for

	cout << res << endl;

	return 0;
}