Server :: Multiple File Pointers In A Single File?

I have files a, b, c and d. They're all relatively large and are served up by a static web server optimized for this purpose. I can get requests that look like this:

/abcd
/ad
/bacdac
...

Each request is basically a request for a concatenation of the files in the order of the letters. The list of possible requests is finite, but large enough that disk space will run out very quickly and be very expensive if I create all possible files via concatenation.Is there a way to create a pointer file like abcd that is essentially a multi-file symlink that first points to a then to be then to c then to d? So if the contents of the files were as follows:

a: hello
b: there
c: whats

[code]....