Contribution #235

Problem: ru/6.1.9

Added 6.1.1 6.1.2 6.1.3 6.1.4 6.1.5 6.1.6 6.1.7 6.1.8 6.1.9 6.1.10 6.1.11 6.1.12 6.1.13 6.1.14 6.1.15 6.1.16 6.1.17 6.1.18 6.1.19 6.1.21 9.2.1 9.2.2

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: October 16, 2023 at 03:32 PM

+3 -3 lines changed