7,6,63
#
in steps
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000000
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00007f
0000ff 0000ff
0000ff
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007f00
007f7f 007f7f
007f7f
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7fffff 7fffff
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0d0a6e 0d0a6e
0d0a6e
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
0f0c7e 0f0c7e
0f0c7e