Art()
This function returns the proper article, "a" or "an", for the <string> by attempting to match it against a set of rules. This function isn't always right, but it makes a good guess most of the time.
Example
> say art(TinyMUX)
You say, "a"
> say art(umbrella)
You say, "an"
> say art(unicycle)
You say, "a"
> say art(ytterbium)
You say, "an"
> say art(one-sided)
You say, "a"
> say art(avocado)
You say, "an"