by steps
000000 000000
000000
72827b 72827b
72827b
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63718b
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55619c
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4751ac
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2a30cd
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ff7f7f
ff7fff ff7fff
ff7fff
0e10ee 0e10ee
0e10ee
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff