by steps
000000 000000
000000
9b849b 9b849b
9b849b
00007f 00007f
00007f
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0000ff
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007f7f 007f7f
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9783a7 9783a7
9783a7
007fff 007fff
007fff
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00ff7f 00ff7f
00ff7f
9482b4 9482b4
9482b4
00ffff 00ffff
00ffff
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9082c0
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8980d9 8980d9
8980d9
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8680e6 8680e6
8680e6
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ff7f7f
ff7fff ff7fff
ff7fff
827ff2 827ff2
827ff2
ffff00 ffff00
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ffff7f
ffffff ffffff
ffffff