by steps
000000 000000
000000
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de359f
00007f 00007f
00007f
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0000ff
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d93297
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d53090
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cc2b81
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c72879 c72879
c72879
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c32672
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ff7fff
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be236a
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ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
ba2163 ba2163
ba2163