Very complicated Regular Expression Help

[jayanthigk2004@yahoo.com]

Is it possible to write a regular expression for this ?

Pattern: 999-99-999

Where 9 is any number from 0 to 9

However the user need not enter ALL the digits and dashes as given in
the format.

Whatever numbers and dashes he had entered must match the above format,
from left to right, for only the charcters he has entered.

For example
9
99
999
999-
999-9
999-99
999-99-
999-99-9
999-99-99
999-99-999

Any of the above should result in a match

Next, he can also put * before or after or before and after any of the
above combination

Ex

*9
*99
*999
*999-
*999-9
*999-99
*999-99-
*999-99-9
*999-99-99
*999-99-999

Or

9*
99*
999*
999-*
999-9*
999-99*
999-99-*
999-99-9*
999-99-99*
999-99-999*

Or

*9*
*99*
*999*
*999-*
*999-9*
*999-99*
*999-99-*
*999-99-9*
*999-99-99*
*999-99-999*

Any help is much appreciated.