21,28,144
#
in steps
000000 000000
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0e138a
00007f 00007f
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0000ff
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007f00
007f7f 007f7f
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11178d 11178d
11178d
00ffff 00ffff
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131a8e 131a8e
131a8e
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151c90
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161e91
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1a2394 1a2394
1a2394
ffff00 ffff00
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ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1c2696 1c2696
1c2696