23,19,13
#
in steps
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000000
120f0a 120f0a
120f0a
00007f 00007f
00007f
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0000ff
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007f00
007f7f 007f7f
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13100a
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16120c
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1b160f 1b160f
1b160f
ffff00 ffff00
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ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1d1810 1d1810
1d1810