Credit Card Number
The Credit Card Number generator type supports only one constructor: (String number). The parameter “number” is a String object specifying the credit card number to be played out as a sequence of digits.
If the specified credit card number includes “-”, then it is played as is, replacing the “-” character with 250 ms of silence; otherwise the number is automatically separated into sections of four digits and played back with 250 ms of silence inserted between sections.