by steps
000000 000000
000000
6cec22 6cec22
6cec22
00007f 00007f
00007f
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0000ff
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00ff7f
6ec730 6ec730
6ec730
00ffff 00ffff
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70b437 70b437
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71a23f 71a23f
71a23f
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728f46 728f46
728f46
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747d4d
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ff7f7f
ff7fff ff7fff
ff7fff
756a54 756a54
756a54
ffff00 ffff00
ffff00
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ffffff ffffff
ffffff
77585c 77585c
77585c