using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

class Problem1
{
    static void Main()
    {
        List<string> strings = Console.ReadLine().Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries).ToList();
        Console.WriteLine("Invalid input parameters.");
        Console.Write("[{0}]", string.Join(", ", strings));
    }
}