Puzzle 4 – AES Mathematical Chemistry

Decode this text to find the next gift:

5VXXmDFYtVPlZmkg9rklRQ==

You’ll need this key to help you out, but it might take some massaging to really get something:

Bismuth, Einsteinium, Lithium, Nitrogen, Polonium, Rhenium, Sulfur, Silicon, Titanium

Hint: When you figure out the code, add it to the url below and paste the link into your browser:

http://playful-moose.com/{code word 1}/

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