by steps
000000 000000
000000
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a8fba9
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00007f
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a7fba8
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00ff7f
a6fba8 a6fba8
a6fba8
00ffff 00ffff
00ffff
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a5fba8 a5fba8
a5fba8
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a4fba8
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a3fba8 a3fba8
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ff0000 ff0000
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a2fba8 a2fba8
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ff7f00 ff7f00
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ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
a1fba8 a1fba8
a1fba8
ffff00 ffff00
ffff00
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ffff7f
ffffff ffffff
ffffff