by steps
000000 000000
000000
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7f7f7f
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00007f
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0000ff
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72817d 72817d
72817d
007fff 007fff
007fff
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00ff7f
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65847c
00ffff 00ffff
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59867b
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3f8c78
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338e77
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ff7fff ff7fff
ff7fff
269176 269176
269176
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ffffff ffffff
ffffff
1a9475 1a9475
1a9475