protected String generateRandomString(String stBase) {
		Random rn = new Random();
		int randFactor = rn.nextInt(6);
		switch (randFactor) {
		case 3: case 5:
			return stBase.toUpperCase() + Math.abs(rn.nextInt());
		case 0: case 2:
			return stBase.toLowerCase() + Math.abs(rn.nextInt());
		}
		return "";
	}