15,4,181
#
in steps
000000 000000
000000
1f08eb 1f08eb
1f08eb
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
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1b07dd 1b07dd
1b07dd
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00ff7f
1706d0 1706d0
1706d0
00ffff 00ffff
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7f0000 7f0000
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7f007f 7f007f
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1305c2 1305c2
1305c2
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7f00ff
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ff7fff ff7fff
ff7fff
03018c 03018c
03018c
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff