15,19,61
#
in steps
000000 000000
000000
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00007f
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0000ff
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007f00
007f7f 007f7f
007f7f
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0b0e2e
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13174c
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171c5c 171c5c
171c5c
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1b216b 1b216b
1b216b
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ffff7f
ffffff ffffff
ffffff
1f267b 1f267b
1f267b