by steps
000000 000000
000000
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0000ff
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7c8105
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7a840a 7a840a
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00ffff 00ffff
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758a15
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728d1a 728d1a
728d1a
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ff7fff
6d9324 6d9324
6d9324
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ffff7f
ffffff ffffff
ffffff
6b962a 6b962a
6b962a