by steps
000000 000000
000000
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00ff00
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00007f
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0000ff
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06f008
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0ce210
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13d418 13d418
13d418
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7fffff
1fb728 1fb728
1fb728
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ff7fff ff7fff
ff7fff
2c9b38 2c9b38
2c9b38
ffff00 ffff00
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ffff7f
ffffff ffffff
ffffff
338d41 338d41
338d41