Help stub error

Help I am a new user I can’t upload images so here is the problem:
I am contributing a clash of code and there is an error with my stub input mismatching with the test cases.

Stub:
read n:int
loop N read s:string(1000)
write answer

(“answer” is in <> but dissapears so i put it here)
Test case:
4
395867
698732
286595
678932

(the big numbers are strings)

Error: “Mismatch with the stub generator input: Expected a number but found N in the stub”

I did input a number: 4. For some reason it doesn’t think that’s a number. Any help?

The error goes away if you use consistent variable names (n versus N).