15,12,143
#
in steps
000000 000000
000000
00007f 00007f
00007f
0000ff 0000ff
0000ff
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007f00
007f7f 007f7f
007f7f
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00ff7f 00ff7f
00ff7f
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070687
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0b098b 0b098b
0b098b
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7f7f7f 7f7f7f
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120f93 120f93
120f93
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161297
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ff7fff ff7fff
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1a159b 1a159b
1a159b
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1e189f 1e189f
1e189f