by steps
000000 000000
000000
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007fff
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7b27da 7b27da
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00ffff 00ffff
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793bc7
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747790
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ff7f7f ff7f7f
ff7f7f
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728b7e 728b7e
728b7e
ffff00 ffff00
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ffff7f
ffffff ffffff
ffffff
719f6c 719f6c
719f6c