using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace template
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = Console.ReadLine() + Console.ReadLine();
            int ret = 0;
            for (int i = 0; i < s.Length; i++)
            {
                if (s[i] == 'o')
                {
                    int j;
                    for (j = 0; i + j < s.Length && s[i + j] == 'o'; j++) ;
                    ret = Math.Max(ret, j);
                }
            }
            Console.WriteLine(ret);
        }
    }
}