by steps
000000 000000
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8a7272
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937c7c
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978282 978282
978282
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ff7f7f
ff7fff ff7fff
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a99797 a99797
a99797
ffff00 ffff00
ffff00
ffff7f ffff7f
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ffffff ffffff
ffffff
ae9d9d ae9d9d
ae9d9d