by steps
000000 000000
000000
a72843 a72843
a72843
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00007f
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0000ff
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aa2b3e
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007fff
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ad2e3a
00ffff 00ffff
00ffff
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b03135
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b33431
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b6372d
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b93a28
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ff7f7f
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ff7fff
bc3d24 bc3d24
bc3d24
ffff00 ffff00
ffff00
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ffff7f
ffffff ffffff
ffffff
c04020 c04020
c04020