using System;
using System.Collections.Generic;
using System.Linq;


class SequenceOfEqualStrings
{
    static void Main()
    {
        List<string> input = Console.ReadLine().Split().ToList();
        input.Sort(string.CompareOrdinal);
        List<string> cleared = input.Distinct().ToList();
        for (int i = 0; i < cleared.Count; i++)
        {
            string element = cleared[i];
            input.FindAll(p => p == element).ForEach(p => Console.Write(p+" "));
            Console.WriteLine();
        }
    }
}