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

namespace _08.MostFrequentNumber
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] numbers = Console.ReadLine()
                .Split(' ')
                .Select(int.Parse)
                .ToArray();

            int bestCount = 0;
            int mostFrequentNumber = 0;

            for (int i = 0; i < numbers.Length; i++)
            {
                int counter = 0;
                for (int j = i + 1; j < numbers.Length - 1; j++)
                {
                    if (numbers[i] == numbers[j])
                    {
                        counter++;
                    }
                    else
                    {
                        continue;
                    }
                }
                if (counter > bestCount)
                {
                    bestCount = counter;
                    mostFrequentNumber = numbers[i];
                }
                else if (counter == bestCount)
                {
                    break;
                }
            }
            Console.WriteLine(mostFrequentNumber);
        }
    }
}