-1 -1 -1
-2 -2 -2
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-6 -6 -6
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-10 -10 -10
-11 -11 -11
-12 -12 -12
-13 -13 -13
-14 -14 -14
-15 -15 -15
-16 -16 -16
-17 -17 -17
-18 -18 -18
-19 -19 -19
-20 -20 -20
