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..oxyyyo..........oyyyzo..
...oxyyyo........oyyyzo...
....o1222o......o1223o....
....o12222o....o12223o....
.ooooo1222o....o2223ooooo.
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..o122223o......o222223o..
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....o122223o..o222223o....
....o1222223oP2222223o....