1 x 8 + 1=9
12 x 8 + 2=98
123 x 8 + 3=987
1234 x 8 + 4=9876
12345 x 8 + 5=98765
123456 x 8 + 6=987654
1234567 x 8 + 7=9876543
12345678 x 8 + 8=98765432
123456789 x 8 + 9=987654321
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