public static String getAllNumber(int lengh){
		StringBuffer buffer = new StringBuffer();
		int maxNumber = (int)Math.pow(10, lengh);
		String space = " ";
		for (int i = 0; i < maxNumber; i++) {
			addFormatNumber(buffer, i, lengh);
			if(i < maxNumber -1){
				buffer.append(space);
			}
		}
		return buffer.toString();
	}