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

    class EqualStrings
    {
        static void Main()
        {
            List<string> input = Console.ReadLine().Split(' ').ToList();
            List<string> reduced = input.Distinct().ToList();

            for(int i=0;i<reduced.Count;i++)
            {
                //Console.Write(reduced[i] + " ");
                for(int j=0;j<input.Count;j++)
                {
                    if(reduced[i]==input[j])
                    {
                        Console.Write(input[j] + " ");
                    }
                }
                Console.WriteLine();

            }
        }
    }