public static void createFile(){
		ArrayList<ArrayList<String[]>> list = train_test();
		ArrayList<String[]> train = list.get(0);
		ArrayList<String[]> test = list.get(1);
		BufferedWriter bw = null;
		try{
            bw = new BufferedWriter(new FileWriter("training"));
            for(int i = 1; i < train.size(); i++){
            	for(String s : train.get(i)){
                     bw.write(s);
         	         bw.write("\t");
            	}
            	bw.write("\n");
            }
            bw.close();
            bw = new BufferedWriter(new FileWriter("test"));
            for(int i = 1; i < test.size(); i++){
            	for(String s : test.get(i)){
                     bw.write(s);
         	         bw.write("\t");
            	}
            	bw.write("\n");
            }
            bw.close();
        }
        catch(IOException e){
            e.printStackTrace();
        }
	}