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

namespace _03.LongestAreaInArray
{
    class LongestAreaInArray
    {
        static void Main()
        {
            int amountOfStrings = int.Parse(Console.ReadLine());
            string lastString = "";
            string biggestString = "";
            int biggestCounter = 0;
            int counter = 1;
            for (int i = 0; i < amountOfStrings; i++)
            {
                string currentString = Console.ReadLine();
                if (currentString.Equals(lastString))
                {
                    counter++;
                }
                else
                {
                    counter = 1;
                }
                if (biggestCounter < counter)
                {
                    biggestCounter = counter;
                    biggestString = currentString;
                }
                lastString = currentString;
            }
            Console.WriteLine(biggestCounter);
            for (int i = 0; i < biggestCounter; i++)
            {
                Console.WriteLine(biggestString);
            }
        }
    }
}