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firstof9
username_0
## Proposed change
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Simplify tracking number regex

## Type of change
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- [ ] Dependency upgrade
- [ ] Bugfix (non-breaking change which fixes an issue)
- [ ] New feature (which adds functionality)
- [ ] Breaking change (fix/feature causing existing functionality to break)
- [x] Code quality improvements to existing code or addition of tests

## Additional information
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- This PR is related to issue: n/a
Simplify tracking number regex
issue