aliases, multi-imports, and the `np.` you'll see everywhere

Write the imports and code so:

1. json is imported normally (no alias)
2. dumps and loads are pulled out of json directly (from json import ...)
3. The script encodes the dict {"city": "boston"} to a JSON string with dumps, then decodes it back to a dict with loads, and prints the decoded city.

Expected output:

boston