FileReader fileReader = new FileReader(args[0]);
        FileWriter fileWriter = new FileWriter(args[1]);

        String str = "";

        while (fileReader.ready()) {
            str += (char) fileReader.read();
        }

        String newString = "";

        String mas[] = str.split(" ");

        for (int i = 0; i < mas.length; i++) {
            if (mas[i].length() > 6) {
                newString += mas[i] + ",";
            }
        }

        String writeString = newString.substring(0, newString.length()-1);
        fileWriter.write(writeString);

        fileReader.close();
        fileWriter.flush();
        fileWriter.close();