using System;

class Program
{
    static void Main()
    {
        string s = Console.ReadLine();
        string t = Console.ReadLine();

        string c = s + t;
        int cnt = 0;
        int ans = 0;

        for (int i = 0; i < 14; i++)
        {
            if (c[i] == 'o') cnt++;
            else cnt = 0;

            ans = Math.Max(cnt, ans);
        }

        Console.WriteLine(ans);
    }
}