public ArrayList gen2(int digit){
		int max = digit+1;
		String num = "";
		ArrayList<BigDecimal> numberList = new ArrayList<BigDecimal>();
		try {
			BufferedWriter out = new BufferedWriter(new FileWriter("1.txt"));
			for(int i=0; i<digit-1; i++){ num+="9"; }
			BigDecimal number = new BigDecimal(num);
			int counter = 0;
			//int fileNum=1;
			while(number.toString().length() < max){
				/*if (counter>=40000){
		        	fileNum++;
		        	counter=0;
		        	out = new BufferedWriter(new FileWriter(fileNum+".txt"));
		        }*/
			        out.write(number.add(new BigDecimal("2")).toString()+"\n");
			        out.write(number.add(new BigDecimal("4")).toString()+"\n");
			        out.write(number.add(new BigDecimal("8")).toString()+"\n");
			        number=number.add(new BigDecimal("10"));
			        out.write(number.toString()+"\n");
			        counter+=4;
			        //System.out.println(number.toString().length()+" < "+max);
			    }
			out.close();
		    }catch (IOException e) {
		}
		return numberList;		
	}