class Program
{
    static void Main(string[] args)
    {
        string oneWeek = Console.ReadLine()!;
        string twoWeek = Console.ReadLine()!;
        int holidayCount = 0;
        int maxHoliday = 0;

        string week = oneWeek + twoWeek;

        foreach (char c in week)
        {
            if (c == 'o')
            {
                holidayCount++;
            }
            else
            {
                holidayCount = 0;
            }

            if (holidayCount > maxHoliday)
            {
                maxHoliday = holidayCount;
            }
        }

        Console.WriteLine(maxHoliday);
    }
}