using System;

using System.Linq;

using System.Collections.Generic;

using System.Collections;

public class Program

{

    public static void Main()

    {

        var aString = "Sammy dan Bailey sedang tidur";

        var bString = "Sammy Bailey";

        var a = aString.Split(' ');

        var b = new Queue(bString.Split(' ')); //Ini jadi O(2N), kalo mau O(N) jangan pakai Split, for sendiri, tiap ketemu spasi push ke Queue

        var missingInOrder = new List<string>();

        var toSearch = b.Dequeue();

        foreach(var word in a)

        {

            if(toSearch.Equals(word)) //INI HARUS PAKAI EQUALS BUKAN ==, REFERENCESNYA BEDA!

            {

                if(b.Count > 0)

                {

                    toSearch = b.Dequeue();

                    continue;

                }

                //Queue udah kosong, kalo kita tarik lagi bakal crash.

                //Jadi kasih aja random string yg ga bakalan match

                toSearch = "This is a random string that will never ever match hahahah";

                continue;

            }

            missingInOrder.Add(word);

        }

        printResult(missingInOrder);

    }

    public static void printResult(List<string> result)

    {

        var resultString = string.Join(" ", result);

        Console.WriteLine(resultString);

    }

}