#include<iostream>
#include<string>
int main()
{
	std::string s, s2;
	std::cin >> s;
	std::cin >> s2;
	s += s2;

	int max = 0;
	int continue_rest = 0;

	for (int i = 0; i < 14; i++)
	{
		if (s[i] == 'o')
		{
			continue_rest++;
		}
		else
		{
			if (max < continue_rest)
			{
				max = continue_rest;
			}
			continue_rest = 0;
		}
	}
	if (max < continue_rest)
	{
		max = continue_rest;
	}
	std::cout << max << std::endl;
	return 0;
}