by steps
000000 000000
000000
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c18539
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bb843e
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00ff7f
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b68443
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b18349
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7fffff
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a68253
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a18259
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ff7f7f
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ff7fff
9c815e 9c815e
9c815e
ffff00 ffff00
ffff00
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ffff7f
ffffff ffffff
ffffff
978164 978164
978164