15,7,21
#
in steps
000000 000000
000000
11080e 11080e
11080e
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007f7f 007f7f
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0f0716
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0e071a 0e071a
0e071a
ffff00 ffff00
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ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
0e071c 0e071c
0e071c