namespace _8.Most_Frequent_Number
{
    using System;
    using System.Linq;

    public class Program
    {
        public static void Main(string[] args)
        {
            int[] inputArray = Console.ReadLine()
                .Split()
                .Select(int.Parse)
                .ToArray();

            int count = 1;
            int mostFreqNum = 0;
            int bestLength = 0;

            for (int i = 0; i < inputArray.Length - 1; i++)
            {
                for (int j = 1; j < inputArray.Length - i; j++)
                {
                        if (inputArray[i] == inputArray[i + j])
                        {
                            count++;
                        }

                        if (count > bestLength)
                        {
                            mostFreqNum = inputArray[i];
                            bestLength = count;
                        }
                }

                count = 1;
            }
            
                Console.WriteLine(mostFreqNum); 
        }
    }
}