by steps
000000 000000
000000
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007f7f
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0000ff
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1c7f7e 1c7f7e
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00ff7f
39807e 39807e
39807e
00ffff 00ffff
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55807d 55807d
55807d
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72817d
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ff7fff
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c7837c
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ffffff ffffff
ffffff
e4847c e4847c
e4847c