Made of high-quality materials, including PVC plastic, ABS, and paper. The contains random characters from a specific series. Each contains one number. No one, including us, knows what\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'s inside.
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