Test Cases for "Wordy" exercise

Hi . I solved the “Wordy” exercise in Haskell using parsec. However, I have submitted 2 solns. First one, the parser checks only for positive or negative integers. Second solutions, simply excludes whitespace and “?”. Both ran successfully. I have a suggestion. Will it be possible to add a test case, where some of the numbers are in the form of “1249a” , and so on? SO that this fails? If it is alright, may I add this test case?

I initially posted this in the Haskell specific thread, but since it applies to the problem in general, I was recommended, posting it here.

For reference, other Wordy test discussions include

FYI, if you click the pencil icon beside the title, you can change the category, as an alternative to reposting