#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main() {
    string s;
    string tmp;
    int max_ct = 0;
    int curr_ct = 0;
    
    cin >> s >> tmp;
    s += tmp;
    
    for (int i = 0; i < 14; i++) {
        if (s[i] == 'o') {
            curr_ct++;
        } else {
            max_ct = max(max_ct, curr_ct);
            curr_ct = 0;
        }
    }
    
    max_ct = max(max_ct, curr_ct);
    cout << max_ct << endl;
    
    return 0;
}