Question: Each character in a password is either a digit [0 9] or lowercase letter [a z]. How many valid passwords are there with the given

Each character in a password is either a digit [0 9] or lowercase letter [a z]. How many valid passwords are there with the given restriction(s)? Length is 9 and cannot start nor end with a digit. Ex: 26 * 36471 Write a? as: a"b

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