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

public class Hello
{
    public static void Main()
    {
        var d = new Dictionary<int, int>();
        var n = int.Parse(Console.ReadLine().Trim());
        for (int i = 0; i < n; i++)
        {
            var s = Console.ReadLine().Trim();
            var a = s.Length - s.Replace("^", "").Length;
            if (d.ContainsKey(a)) d[a]++;
            else d[a] = 1;
        }
        var ans = d.OrderByDescending(x => x.Value).ThenByDescending(x => x.Key).First();
        Console.WriteLine(ans.Key);
    }
}