Test 3: Validating counts...
✓ Original count correct: 50
✓ Unique count correct: 42
✓ Duplicates found correct: 8
✓ Math checks out: original_count = unique_count + duplicates_found
Traceback (most recent call last):
  File "<stdin>", line 41, in <module>
  File "<stdin>", line 41, in <genexpr>
KeyError: 'duplicates'