64,63,67
#
in steps
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000000
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00007f
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0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
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00ff7f 00ff7f
00ff7f
201f21 201f21
201f21
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302f32 302f32
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504f53
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706f75 706f75
706f75
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ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
817f86 817f86
817f86