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Once I thought about it, this puzzle was much easier than others marked medium. It was a simple call to a recursive function. And when I say simple call, I mean simple. The main routine (in lisp) was:
(tile (read) (read) (read) first time arguments...)
The recursive function was about 50 lines long, but it was simple. It was broken into 3 sections. Each section had 4 subsections.
That was a great problem. I knew how to solve it pretty quickly but i spent quite some time gettings the coordinates out
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