21,3,157
#
in steps
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0000ff
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00007f
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007f7f 007f7f
007f7f
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0a01ce
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0f02b5
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15039d
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1a0384
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1f046c 1f046c
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240553 240553
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ffff00
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ffff7f
ffffff ffffff
ffffff
2a063b 2a063b
2a063b