Contribution #560

Problem: ru/8.1.1

Added 8.1.1-8.1.2 8.1.8-8.1.10 8.1.12 8.1.14 8.1.15 8.1.19

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: November 12, 2023 at 07:34 PM

GitHub commit: 54a6c221f2967888c4f0ec896da203d32a1ad5da

+250 -49 lines changed