using System;

namespace No203_1{
    public class Program{
        public static void Main(string[] args){
            var days = Console.ReadLine() + Console.ReadLine() +"ｷﾀ━━━━(ﾟ∀ﾟ)━━━━!!";
            int cnt = 0, max = 0;
            foreach(var day in days){
                if(day == 'o') cnt++;
                else{
                    max = Math.Max(max, cnt);
                    cnt = 0;
                }
            }
            Console.WriteLine(max);
        }
    }
}