8. A five-character license plate consists of English letters and numbers, with exactly two of the first four characters being English letters (letters I and O are not allowed), and the last character must be a number. Xiao Li likes the number 18 and hopes that his license plate contains two adjacent characters 1 and 8, with 1 preceding 8. How many different choices does Xiao Li have for his license plate? (There are 26 English letters in total.)
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