by steps
000000 000000
000000
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e58a88
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0000ff
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c88886
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007fff
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00ff7f
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ab8785
00ffff 00ffff
00ffff
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728483 728483
728483
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558382 558382
558382
ff0000 ff0000
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398181 398181
398181
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ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
1c8080 1c8080
1c8080
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ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff