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Quick Summary

Filter out messages containing any forbidden keyword in their text body.
Keyword matching is case-insensitive and requires exact space-delimited token boundaries.
Return remaining safe messages while preserving their original order.

What This Tests

String tokenization and boundary awareness
Case normalization techniques
Constant-time lookup using hash sets
Early-exit optimization during iteration

Common Patterns

Hashing

Trie

Accepted

30/61

Acceptance Rate49.2%

Test Cases

Input

messages =

unsafeWords =

Output

Expected