(6-12-2022) Seeing this level being discussed before and it showed up on my search page, decided to give it a try.
Yesterday found the 422, then got 420.
Today found another way of 420, cut down to alazeh's 418.
Wondering if I should try something else, but no more idea at the moment...
Too many holes...
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(7-12-2022) Actually in my 418 it was quite close already, I was just doing stupid thing that I thought would save 2 steps.
Great find by everyone!
Insights