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 - [4.3 Search Engines](https://github.com/ghacksuserjs/ghacks-user.js/wiki/4.3-Search-Engines)
 
 ### :small_orange_diamond: Appendix
-- [C: Test Sites](https://github.com/ghacksuserjs/ghacks-user.js/wiki/Appendix-C:-Test-Sites)
-- [D: References](https://github.com/ghacksuserjs/ghacks-user.js/wiki/Appendix-D:-References)
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+- [A: Test Sites](https://github.com/ghacksuserjs/ghacks-user.js/wiki/Appendix-A:-Test-Sites)
+- [B: References](https://github.com/ghacksuserjs/ghacks-user.js/wiki/Appendix-b:-References)
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