gistfile1.java

		/* Initialise all rearrangement matrices */
		lowerX = new RearrangeMatrix(data.getLowerX());
		lowerY = new RearrangeMatrix(data.getLowerY());
		upperX = new RearrangeMatrix(data.getUpperX());
		upperY = new RearrangeMatrix(data.getUpperY());
		
		ExecutorService executor = Executors.newFixedThreadPool(2);

		for (final RearrangeMatrix matrix : new RearrangeMatrix[]{lowerX, lowerY, upperX, upperY}) {
			executor.execute(new Runnable() {
				@Override
				public void run() {
					matrix.rearrange();
				}});
		}
		
		executor.shutdown();
		
		try {
			executor.awaitTermination(99, TimeUnit.DAYS);
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		/* Print RA Ranges */
		printRanges();

		/* Print total duration */
		printDuration(start);