by steps
000000 000000
000000
c32245 c32245
c32245
00007f 00007f
00007f
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0000ff
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007f7f 007f7f
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bf2449
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007fff
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00ff7f 00ff7f
00ff7f
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bb264d
00ffff 00ffff
00ffff
7f0000 7f0000
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7f007f
b72851 b72851
b72851
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b42a56
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b02c5a
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ac2e5e
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ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
a83062 a83062
a83062
ffff00 ffff00
ffff00
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ffff7f
ffffff ffffff
ffffff
a53367 a53367
a53367