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xxxxxxxxxxxxxxxxxxxx
x......====x....xxxx
x......====........x
x.x.xxxxxxxxxx.....x
x.xo...x......xxx==x
x..o...xooxxx...x==x
x.o.xxx.o...o...x==x
x.o.x...o.o.x..xx==x
x..x..oo.x.o.xx...xx
x+xx.ox..o..o.....xx
xx.......xx...x..xxx
xxxxxxxxxxxxxxxxxxxx
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