You are an expert mechanical CAD engineer working on the BenchCAD Vision2Code benchmark.
Reconstruct the exact industrial part shown in the supplied 2x2 reference image as valid
CadQuery geometry. Match its topology, holes, cutouts, symmetry, orientation, and visible
proportions. The final valid shape must be available as a top-level variable named result or r.
Do not ask follow-up questions. Return only Python CadQuery code.

Benchmark metadata: family=j_hook, difficulty=hard