by steps
000000 000000
000000
708426 708426
708426
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
728325 728325
728325
007fff 007fff
007fff
00ff00 00ff00
00ff00
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00ff7f
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748324
00ffff 00ffff
00ffff
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7f007f
768324 768324
768324
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ff7f7f
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ff7fff
7e8321 7e8321
7e8321
ffff00 ffff00
ffff00
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ffff7f
ffffff ffffff
ffffff
818321 818321
818321