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xx===...xx.x....x..x
x====.........o.xx.x
x====x.x.xoxxxo....x
x===x....x.......x.x
xx=x..xo.x.....oxx.x
x..x..x.o.o.xxx..o.x
x.....o..o.x..x.xx.x
xx.x.xx.xoox.ox..x.x
x..x...o.o.x......xx
x....x.....x..x...+x
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