Contribution #1608

Problem: ru/2.1.2

Added 2.1.11; Updated 2.1.1-2.1.10,2.1.12-13

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: June 24, 2024 at 05:18 PM

GitHub commit: ce51ac415a226b087279125f3af8af84c9f19b42

+120 -249 lines changed