by steps
000000 000000
000000
75a56d 75a56d
75a56d
00007f 00007f
00007f
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0000ff
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007f00
007f7f 007f7f
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00ff7f 00ff7f
00ff7f
73977d 73977d
73977d
00ffff 00ffff
00ffff
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729085
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728a8e
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718396 718396
718396
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707c9e 707c9e
707c9e
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ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
6f75a6 6f75a6
6f75a6
ffff00 ffff00
ffff00
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ffff7f
ffffff ffffff
ffffff
6f6faf 6f6faf
6f6faf