Greater Than (2): Everything in this space must be greater than 2. The answer is 4-4, placed vertically.
Credit: The Pokémon Company
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For implementers, the locking model adds a fair amount of non-trivial internal bookkeeping. Every operation must check lock state, readers must be tracked, and the interplay between locks, cancellation, and error states creates a matrix of edge cases that must all be handled correctly.