by steps
000000 000000
000000
70a878 70a878
70a878
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00007f
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0000ff
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007f00
007f7f 007f7f
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709e78
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007fff
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00ff7f
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719478
00ffff 00ffff
00ffff
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728a79 728a79
728a79
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738179
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747779 747779
747779
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756d7a 756d7a
756d7a
ff7f00 ff7f00
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ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
76637a 76637a
76637a
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
775a7b 775a7b
775a7b