21,36,120
#
in steps
000000 000000
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0f1f7f
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00007f
0000ff 0000ff
0000ff
007f00 007f00
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10207d
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12217b 12217b
12217b
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7f007f 7f007f
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192772 192772
192772
ffff00 ffff00
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ffff7f ffff7f
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ffffff ffffff
ffffff
1b2971 1b2971
1b2971