Unsurprisingly, perhaps, at this point, you find another puzzle grid among the napkins. More surprisingly, upon examination, it actually contains instructions: "Each entry in this grid starts from its numbered square and travels in any orthogonal direction, making exactly one right-angled turn at some point."
"Well, at least we know how to treat this one," you optimistically state.
"You never know - it could take a turn for the worse."
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