HOW IT IS GENERATED
Create random pairs
Shuffle all entries and pair adjacent items.
List of itemsPairsRuns locally
01List of items
02Shuffle → pair adjacent entries
03Pairs
With an odd number of entries, one item remains unpaired.
Odd-sized lists cannot form complete pairs
The last shuffled entry is explicitly marked as unpaired.
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02
In short
What exactly does it do?
Shuffle all entries and pair adjacent items.
Example?
With an odd number of entries, one item remains unpaired.