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    "## Warm Up - counting 9s\n",
    "\n",
    "Write a python function to do the following\n",
    "\n",
    "Given an array of ints, return the number of 9's in the array.\n",
    "```\n",
    "array_count9([1, 2, 9]) → 1\n",
    "array_count9([1, 9, 9]) → 2\n",
    "array_count9([1, 9, 9, 3, 9]) → 3\n",
    "```"
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    "# Your code here\n"
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