20,3,143
#
in steps
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000000
2807a0 2807a0
2807a0
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00007f
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0000ff
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23069b
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1e0597
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ff7fff ff7fff
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050083 050083
050083
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff