public void distinctSort(String inputPath, String outputPath) throws IOException {
        Files.lines(Paths.get(inputPath))
            .filter(s -> {
                try {
                    Integer.parseInt(s);
                    return true;
                } catch (NumberFormatException nfe) {
                    return false;
                }
            })
            .map(Integer::parseInt)
            .distinct()
            .sorted()
            .forEachOrdered(s -> {
                try {
                    RandomAccessFile out = new RandomAccessFile(outputPath, "rw");
                    Files.write(Paths.get(outputPath), (s + "\n").getBytes(), StandardOpenOption.APPEND);
                } catch (IOException ioe) {
                    ioe.printStackTrace();
                }
            });
}