Update README.md

Author: SValentyn

README.md

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-Description project: structure and processing of [2-3 tree](https://en.wikipedia.org/wiki/2–3_tree). Comments in the program in Russian (will change later). Also presented is my term paper on this topic (but in Ukrainian). 
+Description project: structure and processing of [2-3 tree](https://en.wikipedia.org/wiki/2–3_tree). Comments in the program in Russian. Also presented is my term paper on this topic (but in Ukrainian). 
 
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