Contribution #163

Problem: ru/5.1.9

Added 10.2.2 11.2.15 13.4.23 2.4.4 2.4.42 2.5.23 5.1.9 5.11.6 5.6.28 5.9.18 6.1.14 6.5.9

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: October 11, 2023 at 10:47 PM

GitHub commit: 02e9b5ab37d5e1e23c8cc44a301f65d15930320d

+237 -48 lines changed