#include <iostream>
#include <string>
#include <map>
#include <cmath>
#include <algorithm>
#include <vector>

using namespace std;

int main(void){
	string s1,s2;
	cin >> s1 >> s2;
	s1 += s2;
	int ret = 0,a=0;
	for(int i=0;i<s1.size();i++){
		if(s1[i] == 'o')a++;
		else a = 0;
		ret = max(a,ret);
	}
	cout << ret << endl;
	return 0;
}