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

int main()
{
	string a,b;
	cin>>a;
	cin>>b;
	a += b;

	int d = 0;
	int e = 0;
	for (int i = 0; i < 14; ++i)
	{
		if(a.at(i) == 'o'){
			d++;
		}else{
			d = 0;
		}
		if(d > e){
			e = d;
		}
	}
	cout<<e<<endl;
	return 0;
}