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

namespace _05_Sort_Numbers
{
    class Program
    {
        static void Main(string[] args)
        {
            List<decimal> numbers = Console.ReadLine().Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries).Select(decimal.Parse).OrderBy(x => x).ToList();

            Console.WriteLine(String.Join(" <= ", numbers));
        }
    }
}