using System;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static void Main(string[] args)
    {
        string s = Console.ReadLine() + Console.ReadLine();
        int[] ans = new int[14];
        int m = 0;

        for (int i = 0; i < s.Length; i++)
        {
            if (s[i] == 'o')
            {
                ans[m]++;
            }
            else
            {
                m += 1;
            }
        }

        Console.WriteLine(ans.Max());
        Console.Read();
    }
}