8. (10 points) The bus route number is a three-digit number displayed on a digital display, where each digit is shown using seven fluorescent tubes arranged horizontally and vertically, as shown in the figure. A bus's digital display has one broken fluorescent tube that does not light up, showing the route number as “351”. The possible route numbers are $\qquad$.

Translate the above text into English, please retain the original text's line breaks and format, and output the translation result directly.
【Analysis】According to the seven-segment display that can form a digit, we can discuss all possible cases based on 351.
【Solution】Solution: Consider the three digits “351” as a three-digit number.
If the faulty segment is in the units place, 1 can become 7 by adding 1 segment, so it could be 357. If the faulty segment is in the tens place, 5 can become 6 or 9 by adding one segment, so it could be 361 or 391. If the faulty segment is in the hundreds place, 3 can become 9 by adding one segment, so it could be 951. There is also one more case, which is 351, where the faulty segment is in a position that does not need to be lit. Answer: There are a total of 5 different lines.

Therefore, the answer is: 5.