import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Scanner;

public class Main
{
    public static void main(String[] args)
    {
	ArrayList<Position> ppp = new ArrayList<>();
	File f = new File("/home/gtowell/Public206/data/lab02/bigtrades.txt"); 
	try (Scanner s = new Scanner(f))
	{
	    while (s.hasNextLine())
	    {
		String line = s.nextLine();
		String[] aa = line.split(" ");
		Position pp = new Position(aa[0], Integer.parseInt(aa[1]));
		boolean updated=false;
		for (Position op : ppp)
		{
		    if (op.getSymbol().equals(pp.getSymbol()))
		    {
			op.updateAmount(pp.getAmount());
			updated=true;
			break;
		    }
		}
		if (!updated)
		{
		    ppp.add(pp);
		}
	    }
	    s.close();
	    for (Position p : ppp)
	    {
		if (p.getAmount()!=0)
		{
		    System.out.print(p.getSymbol() + " " + p.getAmount() + "\n");
		}
	    }
	}
	catch (FileNotFoundException e)
	{
	    System.err.println(e);
	}
    }
}