Describe(tests)
{
  It(test1){Assert::That(firstNVowels("sharpening skills", 3), Equals("aei"));}
	It(test2){Assert::That(firstNVowels("major league", 5), Equals("aoeau"));}
	It(test3){Assert::That(firstNVowels("crabby patty", 2), Equals("aa"));}
	It(test4){Assert::That(firstNVowels("shrimp", 1), Equals("i"));}
	It(test5){Assert::That(firstNVowels("shrimpy", 2), Equals("invalid"));}
	It(test6){Assert::That(firstNVowels("hostess", 5), Equals("invalid"));}
};