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

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