#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
    string a,b;
    cin>>a>>b;
    a += b;
    int now = 0;
    int ans = 0;
    for(int i=0;i<14;i++){
        if(a[i] == 'o') now++;
        else{
            ans = max(ans,now);
            now = 0;
        }
    }
    cout<<max(ans,now)<<endl;
}