21,27,108
#
in steps
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0b176b
00007f 00007f
00007f
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0000ff
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007f7f 007f7f
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0d186b
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10196b
00ffff 00ffff
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121a6b 121a6b
121a6b
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151b6c
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171c6c 171c6c
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1a1d6c 1a1d6c
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ff7fff ff7fff
ff7fff
1c1e6c 1c1e6c
1c1e6c
ffff00 ffff00
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ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1f206d 1f206d
1f206d