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

// Write a program to find the longest area of equal elements in array of strings.
// You first should read an integer n and n strings (each at a separate line),
// then find and print the longest sequence of equal elements (first its length, then its elements).
// If multiple sequences have the same maximal length, print the leftmost of them.

class Pr06LongestAreaInArray
{
    static void Main(string[] args)
    {
        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);
        }
    }
}