by steps
000000 000000
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3d889b
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7fffff
88845e 88845e
88845e
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978352 978352
978352
ff7f00 ff7f00
ff7f00
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ff7f7f
ff7fff ff7fff
ff7fff
a68246 a68246
a68246
ffff00 ffff00
ffff00
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ffff7f
ffffff ffffff
ffffff
b6823a b6823a
b6823a