public static HashMap<Integer, Integer> woodBlockRegistry = new HashMap<Integer, Integer>();

	public static boolean isWood(int i) { return woodBlockRegistry.containsValue(i); }

	public static void addWoodBlock(int i) {
		int j = 0;
		do {
			if(woodBlockRegistry.get(j) != null) {
				j++;
				continue;
			} else {
				woodBlockRegistry.put(j, i);
				break;
			}
		} while(true);
	}