by steps
000000 000000
000000
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00007f
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0000ff
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007f7f 007f7f
007f7f
03048b 03048b
03048b
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007fff
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00ff7f
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070997
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7f007f
0a0da3 0a0da3
0a0da3
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0e12b0
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1217bc
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151bc8 151bc8
151bc8
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ff7fff ff7fff
ff7fff
1920d4 1920d4
1920d4
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1d25e1 1d25e1
1d25e1