30,20,22
#
in steps
000000 000000
000000
1a1113 1a1113
1a1113
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00007f
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0000ff
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007f7f 007f7f
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1b1113 1b1113
1b1113
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1c1214
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1d1315
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1e1416
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1f1417 1f1417
1f1417
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201518 201518
201518
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211619 211619
211619
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ffffff ffffff
ffffff
23171a 23171a
23171a