by steps
000000 000000
000000
a886d1 a886d1
a886d1
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00007f
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0000ff
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007f7f
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00ff7f
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728ab4 728ab4
728ab4
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608cab
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4e8da1 4e8da1
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3c8f98
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ff7f7f
ff7fff ff7fff
ff7fff
2a908e 2a908e
2a908e
ffff00 ffff00
ffff00
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ffff7f
ffffff ffffff
ffffff
189285 189285
189285