1 X 8 + 1 = 9
1 2 X 8 + 2 = 9 8
1 2 3 X 8 + 3 = 9 8 7
1 2 3 4 X 8 + 4 = 9 8 7 6
1 2 3 4 5 X 8 + 5 = 9 8 7 6 5
1 2 3 4 5 6 X 8 + 6 = 9 8 7 6 5 4
1 2 3 4 5 6 7 X 8 + 7 = 9 8 7 6 5 4 3
1 2 3 4 5 6 7 8 X 8 + 8 = 9 8 7 6 5 4 3 2
1 2 3 4 5 6 7 8 9 X 8 + 9 = 9 8 7 6 5 4 3 2 1
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