Question: What would be the answer to this one? Each character in a password is either a digit 10-9 or lowercase letter [a-zl How many valid

What would be the answer to this one?

Each character in a password is either a digit 10-9 or lowercase letter [a-zl How many valid passwords are there with the given restriction(s)? Length is 9 or 19. Writea as:

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