public static void main(String[] args) {
        System.out.println(pw(100));
    }
    private static final Random random = new java.security.SecureRandom();
    private static char[] chars = "01234567879qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM".toCharArray();
    private static String pw(int min, int max) {
        return new String(IntStream.range(0,random.nextInt(Math.abs(min-max))).map(i -> chars[random.nextInt(chars.length)]).toArray(),0,len);
    }