15,51,111
#
in steps
000000 000000
000000
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00007f
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0000ff
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007f00
007f7f 007f7f
007f7f
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7f007f
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0b2673
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133f6b 133f6b
133f6b
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174c67
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1b5963 1b5963
1b5963
ffff00 ffff00
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ffff7f ffff7f
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ffffff ffffff
ffffff
1f665f 1f665f
1f665f