Starting a game with the obvious starting sequences. Backspace doesn't work, so I needed to re-do my second guess.
Continuing to guess. I have isolated that neither 5 nor 6 is used, so I can use that pair to isolate other pairs.
Making more deductions. I have now confirmed that 1, 3, 7, and 9 are the selected numbers, but not in that order. However, I already have enough clues to guess the order next.
And complete!
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