using System;
 using System.Text;
 class LongestAreaInArray
    {
        static void Main()
        {
            int n = int.Parse(Console.ReadLine());

            string[] strings = new string[n];

            int count = 1;
            int maxCount = 1;
            string theWord;
            for (int i = 0; i < n; i++)
            {
                strings[i] = Console.ReadLine().Trim();
            }
            theWord = strings[0];

            for (int i = 0; i < strings.Length - 1; i++)
            {
                if (strings[i] == strings[i + 1])
                {
                    count++;
                    if (count > maxCount)
                    {
                        maxCount = count;
                        theWord = strings[i];
                    }
                }
                else
                {
                    count = 1;
                }
            }
            var sb = new StringBuilder();
            sb.AppendLine(maxCount.ToString());
            for (int i = 0; i < maxCount; i++)
            {
                sb.AppendLine(theWord);
            }
            Console.WriteLine();
            Console.Write(sb);
        }
    }