by steps
000000 000000
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837f10
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8b802d 8b802d
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00ffff 00ffff
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97835a 97835a
97835a
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ff7f7f
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9f8578 9f8578
9f8578
ffff00 ffff00
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ffff7f
ffffff ffffff
ffffff
a48687 a48687
a48687