# include <iostream>
# include <iomanip>
# include <algorithm>

using namespace std;


int main()
{
    string s, s1, s2;
    cin >> s1 >> s2;
    s = s1 + s2;

    int cnt = 0;
    int max = 0;

    int i = 0;
    while (true){
        if (s[i] == 'o') {
            cnt++;
        }else{
            cnt = 0;
        }
        if (max < cnt) {
            max = cnt;
        }
        i++;
        if (i == s.length()) break;
    }

    cout << max << endl;





}