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Glad to hear that you are also from Hong Kong :D
Back to the issue, thank you for the feedback, I have added an extra example in the Kata description which should make it clear what is meant in this Kata as a string "containing a valid HK phone number".
Issue resolved
Cheers,
donaldsebleung
Hello xxnatc,
May you provide more details as to how you think the Kata description and example test cases can be improved? As far as I know, I think the description is pretty clear as to what constitutes a valid HK phone number.
Cheers,
donaldsebleung