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xxxxxxxxxxxxxxxxxxxx
x........x...x+.x..x
x.oo..xoox.x.x..xx.x
x..x.o.o.xoo.x.....x
xx.x..x..x.x.x..x..x
x...xx.......x.....x
x...x.o.x...x...x..x
x.o.xo.x...x..o.x==x
xxo.x..xxxx....x===x
x..o..........x====x
x...x..x.....x=====x
xxxxxxxxxxxxxxxxxxxx
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