(?=.[0-9]) =must contain numbers, (?=.[!@#$%^&]) =must contain special. symbols , (?=.[a-z]) =must contain Latin letters, (?=.[A-Z]) =must contain capital Latin letters, [0-9a-zA-Z!@#$%^&] =can contain numbers, Latin letters, special. symbols {6,} =must contain 6 and more chars,