#include<iostream>
#include<algorithm>

using namespace std;

int main()
{
	string s1,s2;
	cin >> s1 >> s2;
	s1+=s2;
	int max_cnt=0;
	for(int i=0;i<s1.size()-1;i++)
	{
		if(s1[i]!='o') continue;
		int cnt=1;
		for(int j=i+1;j<s1.size();j++)
		{
			if(s1[j]=='o'){
				cnt++;
			}else{
				break;
			}
		}
		max_cnt = max (cnt,max_cnt);
	}
	cout << max_cnt << endl;
}