by steps
000000 000000
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728366 728366
728366
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00007f
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0000ff
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748363
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007fff
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00ff7f
768360 768360
768360
00ffff 00ffff
00ffff
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79835d 79835d
79835d
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7d8457
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ff7f7f
ff7fff ff7fff
ff7fff
828451 828451
828451
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
85854e 85854e
85854e