using System;

class Program
{
    static void Main()
    {
        string s = Console.ReadLine();
        string t = Console.ReadLine();
        s = s + t;
        int cnt=0,ans=0;
        for (int i = 0; i < s.Length; i++)
        {
            if (s[i] == 'o')
            {
                cnt++;
            }
            else
            {
                cnt = 0;
            }
            ans = Math.Max(cnt, ans);
        }

        Console.WriteLine(ans);
    }
}