by steps
000000 000000
000000
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00007f
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0000ff
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007f7f 007f7f
007f7f
13178b 13178b
13178b
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007fff
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00ff7f
262f97 262f97
262f97
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3947a3 3947a3
3947a3
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728ec8 728ec8
728ec8
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ff7f7f
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ff7fff
85a6d4 85a6d4
85a6d4
ffff00 ffff00
ffff00
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ffff7f
ffffff ffffff
ffffff
99bee1 99bee1
99bee1