by steps
000000 000000
000000
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c5bb7c
00007f 00007f
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0000ff
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c5ba7b
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00ff7f
c6ba7a c6ba7a
c6ba7a
00ffff 00ffff
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c6b979
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c7b978 c7b978
c7b978
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c8b876
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ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
c8b875 c8b875
c8b875
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ffffff ffffff
ffffff
c9b875 c9b875
c9b875