pub const PERSIAN_ALPHABET: &str = r"\u0621-\u0628\u062A-\u063A\u0641-\u0642\u0644-\u0648\u064E-\u0651\u0655\u067E\u0686\u0698\u06A9\u06AF\u06BE\u06CC|\p{arabic}";
Should be used inside the list method for its full capability.