Concentration (Normal Size) - Using Different Images

This user-submitted variation of my original Concentration game uses different but related images to match. Works like the original, but with a twist.
For those of you who want to know the image matching "scheme", see the illustration below. The numbers are the suffix for the image filenames, the upper number is the match for the bottom number:

123456789101112131415161718
1009998979695949392919089888786858483








Instructions:



1: Copy and paste the following script in the HEAD section of your page:
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2: Copy and paste the following HTML and Javascript in the BODY section of your page wherever you want the game to appear:
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