21,5,127
#
in steps
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000000
060680 060680
060680
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00007f
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0000ff
007f00 007f00
007f00
007f7f 007f7f
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0d057f 0d057f
0d057f
00ffff 00ffff
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7f007f 7f007f
7f007f
11057f 11057f
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1d057f 1d057f
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ff7fff
21057f 21057f
21057f
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
25057f 25057f
25057f