Tags: python base64 xor 

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Original writeup (https://docs.google.com/document/d/e/2PACX-1vTwur-WIC87pPhVbNuqWPnVFPGYb3TuxoaNIdBoKaEEayUpu27QUQQ8qVvPxezsZNHMqdbQBmlGwHAk/pub#h.d7dup1mk3zny).