Contribution #501

Problem: ru/5.11.12

Added 5.11.1-5.11.2 5.11.4-5.11.5 5.11.7-5.11.12

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: November 7, 2023 at 02:22 PM

GitHub commit: cd91f0a7c0df4f2e0b85ccbc6f15f45363ec04c2

+245 -50 lines changed