by steps
000000 000000
000000
01ca36 01ca36
01ca36
00007f 00007f
00007f
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0000ff
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20c02f
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007fff
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00ff7f
40b728 40b728
40b728
00ffff 00ffff
00ffff
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60ad21 60ad21
60ad21
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80a41b 80a41b
80a41b
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ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
df8806 df8806
df8806
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff