There are 8*7/(2*1) = 28 combinations.
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28, or 56 counting reversals
There are 9C2 = 9*8/(2*1) = 36 2-digit combinations.
There are 8C6 = 8*7/(2*1) = 28 combinations.
There are 125970 combinations and I am not stupid enough to try and list them!
8C3 = 56 of them