Ok, obviously you're going to have to make a lap on the trapdoors. The only things you control are
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×where you pause
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×no effect
and where you cut corners
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×some effect if you cut the right corners
my solution:
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×go clockwise, and cut the SW (last) corner. Use the crumbly wall to save one trapdoor. Then go as far west as possible and the ww should level with you vertically. Then, kill the ww against the single square wall, and use the trapdoor that you left (by using the crumbly wall) to make your exit
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