Apologies for not assisting you with debugging, but at least I confirm: -4 passes the testsuite on all my setups.
Meow! -- ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢰⠒⠀⣿⡁ Imagine there are bandits in your house, your kid is bleeding out, ⢿⡄⠘⠷⠚⠋⠀ the house is on fire, and seven big-ass trumpets are playing in the ⠈⠳⣄⠀⠀⠀⠀ sky. Your cat demands food. The priority should be obvious...