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Buffers: [AABEFFHHKMOOQRRSSTUV] ... Bitmap: [0011011100000111101101001100011000001111]
OOL Buffer: ... [22....................BBCDEEFFHHHIJKKLLMNOOPPQRRRSSSTUVVVWY] [2...................AABBCDEEFFHHHIJKKLLMNOOPPQRRRSSSTUVVVWY]