Contribution #1435

Problem: en/5.9.10

Added Luis's English solution of 5.9.10

Editor: Luis Daniel Fernández Quintana ( @Luisito )

Time: June 16, 2024 at 09:48 PM

GitHub commit: 3a5f6c76a2031449d40cad8beccc1ef7c02cbf27

+257 -10 lines changed