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Alphabetic filtering admits combining letter numbers · case 02
Alphabetic filtering admits combining letter numbers.
Case contract
Keep only Unicode characters whose general category starts with L.
Why this case matters
A local executable model for consumers of structured text; oracle values are authored literals, not outputs copied from the repaired implementation.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| boundary 1 | "A1\u2163" | "A" | Failed |
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