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    In test case 8 the 5th pattern expects a "no". I have tabulated the number of upper and lower case letters in variable "a" and "b" and can't see why this cannot be matched. In no case do I find an upper case letter count in variable "a" higher than b, and there's enough upper case paired with lower case letters in "a" to satisfy the number of uppercase letters needed in "b". The rest of lowercase letters can be dropped. Am I missing something ?