Contribution #84

Problem: ru/9.1.13

Added 9.1.6-9.1.15

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: October 11, 2023 at 07:47 AM

GitHub commit: 8fe27cd68e504e85e1c3775f2c773de3ace33f93

+236 -48 lines changed