One letter, one digit is represented by one number each
Vanity: Single digits
The entered text is immediately converted and output.
The space character can be displayed either as 0 or 1.
Decoding is not possible, because one digit stands for several letters – a reverse conversion is not one-to-one.
A letter/digit is represented by the number of keystrokes respectively
Vanity: groups of digits
The entered text is immediately converted and output.
The space character can optionally be displayed as 0 or 1.