#include<iostream>
#include <math.h>
#include <string>
using namespace std;

int main(){
	string c1;
	string c2;
	string c3;
	string j;
	int cnt = 0;
	int max = 0;
	cin >> c1;
	cin >> c2;
	c3 = c1 + c2;
	for (int i = 0; i < 14; i++){
		j = c3.substr(i, 1);
		if (j == "o"){
			cnt += 1;
			if (cnt>max){
				max = cnt;
			}
		}
		else{
			if (cnt>max){
				max = cnt;
			}
			cnt = 0;
		}

	}
	cout << max << endl;
	return 0;
}