A Finnish registration consists of 3 letters and 3 numbers with empty spaces possible. Numbers do not have leading zeroes and the number part cannot be only zero (for example AAA-001 isn't a valid plate but AAA-1 is). The registration plate must have at least one letter and one number. How many possible Finnish registration plates are possible to exist when the letters used are the 26 letters of the latin alphabet? Answer: How many possible plates there could be if we also allowed the letters , and ?

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