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

namespace _07.Max_Sequence_of_Increasing_El
{
    class Program
    {
        static void Main(string[] args)
        {
            var numbers = Console.ReadLine()
                .Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)
                .Select(int.Parse).ToArray();
            int currentNumber=0;
            var currentSequence = "";
            var biggestSequence = "";
            for (int i = 0; i < numbers.Length; i++)
            {
                if (i == 0)
                {
                    currentNumber = numbers[i];
                    currentSequence += currentNumber;
                }
                else
                {
                    if (currentNumber == numbers[i] - 1)
                    {
                        currentSequence += numbers[i];
                        currentNumber = numbers[i];
                    }
                    else if (currentNumber!=numbers[i]-1)
                    {
                        if (biggestSequence.Length<currentSequence.Length)
                        {
                            biggestSequence = currentSequence;
                        }
                        currentSequence = "";
                        currentNumber = numbers[i];
                        currentSequence += currentNumber;
                    }
                }
            }
            if (biggestSequence.Length < currentSequence.Length)
            {
                biggestSequence = currentSequence;
            }
            char[] bigest = biggestSequence.ToCharArray();
            Console.WriteLine(string.Join(" ",bigest));
        }
    }
}