using System;
using System.Text;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		// Paste the raw follows with names and IDs into the input below.
		var followsRaw = new StringBuilder();
		int iChar;
		while ((iChar = Console.Read()) != -1)
		{
			followsRaw.Append(Convert.ToChar(iChar));
		}
		
		string pattern = @"(?<ID>\d+)\s{3,}";
		var rgx = new Regex(pattern);
		MatchCollection matches = rgx.Matches(followsRaw.ToString());
		var followIDs = new StringBuilder();
		foreach (Match m in matches)
		{
			followIDs.Append(m.Groups["ID"].Value);
			followIDs.Append(", ");
		}
		
		if (matches.Count > 0)
		{
			// Remove trailing comma and print.
			followIDs.Length -= 2;
			Console.Write(followIDs.ToString());
		}
		else
		{
			Console.WriteLine("Input could not be read.");
		}
	}
}