Contribution #669

Problem: ru/2.1.15

Added 2.1.28 2.1.31-2.1.36

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: November 24, 2023 at 10:12 PM

GitHub commit: f898604dd24599be49680350392ed81489bc7709

+80 -66 lines changed