#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

int main(){
    string s1, s2;
    cin >> s1 >> s2;
    s1 += s2;
    int ans = 0;
    for(int i = 0; i < s1.size(); i++){
        int j = i;
        for(; j < s1.size(); j++){
            if(s1[j] != 'o') break;
        }
        ans = max(ans, j-i);
    }
    cout << ans << endl;
    return 0;
}