using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        IEnumerable<string> emptyCollection = new List<string>();

        IEnumerable<string> populatedCollection = new List<string>{"0092YX-E","0016YD-E","000C7F-E","004GFQ-E","081DJS-E","0035K2-E","BAC-US","PEBO-US","DUMMY"};

        foreach (var item in populatedCollection)

        {

            if (item.Contains("-"))

            {

                emptyCollection.Append(item);

            }

        }

        foreach (var item in emptyCollection)

        {

            Console.WriteLine(item);

        }

    }

}