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Problem for 2026-11-11 (UTC)

Group the anagrams

Medium

hash maps

strings

Group a list of words so words made of the same letters are together.

Example

["listen", "stone", "silent", "notes", "enlist"] → [["listen", "silent", "enlist"], ["stone", "notes"]]

Hints

Hint 1

Two words are anagrams if their sorted letters match.

Hint 2

Use the sorted letters (or a letter count) as a map key.

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