#include <algorithm>
#include <iostream>
#include <iomanip>
#include <map>
#include <numeric>
#include <set>
#include <sstream>
#include <string>
#include <vector>
#include <cmath>
using namespace std;

#define FOR(i,s,e) for (int i = int(s); i != int(e); i++)
#define FORIT(i,c) for (typeof((c).begin()) i = (c).begin(); i != (c).end(); i++)
#define ISEQ(c) (c).begin(), (c).end()



int main(){
	string s1;
	string s2;
	cin >> s1 >> s2;
	s1 += s2;
	int max = 0;
	int now = 0;
	FOR(i,0,14){
		if(s1[i] == 'o'){
			now++;
		}else{
			if (max < now) max = now;
			now = 0;
		}
	}
	if (max < now) max = now;
	cout << max << endl;
	return 0;
}