You have several examples. What is the format of the actual data file you will be using?
B5 is exactly the same as D5 but you say that B5 is valid and D5 is invalid. Why is it invalid?
There is nothing in your data that suggests a sequence or incrementing. What does this mean: "Number must be incremental by +300 everytime"? None of the numbers are divisible by 300, nor incremented from any other number by 300.
I don't understand your case-sensitive requirement. "Follow the case sensitive" Compared to what?
A rule for the length would be
but it's unclear what you need as far as the increment and the case.
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