#include <iostream>	//cin, cout
#include <vector>	//vector
#include <algorithm> //sort,min,max
#include <string>	//string
#include <ios>		//fixed
#include <iomanip>	//setprecision
#include <utility> //swap
#include <cstdlib>	//abs(int)
#include <cmath>	//sqrt
#include <sstream>	//stringstream,getline
#include <cmath>	//ceil

using namespace std;

int main() {

	string s1, s2;
	cin >> s1 >> s2;

	s1 = s1 + s2;

	int temp = 0, ans = 0;
	for (int i = 0; i < 14; i++) {
		if (s1[i] == 'o') {
			temp++;
		}
		else {
			if (temp > ans) {
				ans = temp;
			}
			temp = 0;
		}
	}

	if (temp > ans) {
		ans = temp;
	}

	cout << ans << endl;

	return 0;

}