Contribution #134

Problem: ru/2.1.5

Added 2.1.4 2.1.5 2.1.57 2.1.58 2.1.6

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: October 11, 2023 at 06:33 PM

GitHub commit: dde8f8893f93eafa31d6215654241edd3bba4b58

+235 -49 lines changed