private HashSet<Tile> getVoid() {
		HashSet<Tile> hsTile = new HashSet<Tile>();
		for (Tile t : alTiles) {
			for (int i = 0; i < t.getNeighboorsCount(); i++) {
				if (t.getNumberOfRealNeighboors(i) >= 1) {
					Tile n = t.getNeighboorBySide(i);
					if (n.isFakeTile()
							&& n.getNumberOfRealNeighboors((i + 3) % 6) >= 1) {
						hsTile.add(n);
					}
				}
			}
		}
		System.out.println(hsTile);
		return hsTile;
	}