#include <iostream>
#include <string>
#include <cmath>
using namespace std;

int main(){
   int ans = 0,now = 0;
   string a,b;
   cin >> a >> b;
   a += b;
   for(int i = 0;i < 14;i++){
      if(a[i] == 'o'){
         now++;
         ans = max(now,ans);
      }else now = 0;
   }
   cout << ans << endl;
}