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Practice
Extract a ticket prefix
A ticket code is "SUP-2048". What does code[:3] produce?
Text transformation review
Normalize format without erasing business meaning
Inspect
PresenceRequired?
FormatDefined?
Transform
WhitespaceTargeted
CaseIntentional
Verify
MeaningPreserved
EdgesTested
Different text states need different protections. Keep identifiers, separators, blanks, and capitalization tied to an explicit contract.