18-6=, 12, 17-6=, 11, 16-6=, 10, 15-6=, 9, 14-6=, 8, 13-6=, 7, 12-6=, 6, 11-6=, 5, 10-6=, 4, 9-6=, 3, 8-6=, 2, 7-6=, 1, 6-6=, 0

-6 Subtraction

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