using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var counts = new int[1000];
        for (var i = 0; i < n; ++i) ++counts[ReadLine().Length - 2];
        var max = 0;
        for (var i = 0; i < counts.Length; ++i)
        {
            if (counts[max] <= counts[i])
            {
                max = i;
            }
        }
        WriteLine(max);
    }
}