import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class ShopProducts {

	public static void main(String[] args){
	
		List<Product> pa = new ArrayList<Product>();
		
		Collections.sort(pa, new ProductComparator());
	
	}
	
	class ProductComparator implements Comparator{

		public int compare(Object one, Object two){
			return ((Product)one).getCategory().compareTo(((Product)two).getCategory());
		}
	}	
}

// Possible categories listed in the desirable order:
// DVD, CD, GAME, BOOK, ACCESSORIES

class Product{
	private String name;
	private String category;
	private int id;
	
	public void setName(String name){
		this.name = name;
	}
	
	public String getName(){
		return name;
	}

	public void setCategory(String cat){
		this.category = cat;
	}
	
	public String getCategory(){
		return this.category;
	}
	
	public void setId(int id){
		this.id = id;
	}
}