private void ValidateResult(string s, bool expected)
{
Assert.AreEqual(
expected,
Question_1_4.IsPalindromePermutationFast(s),
$"IsPalindromePermutationFast failed with {s}");
Assert.AreEqual(
expected,
Question_1_4.IsPalinromePermutationMinSpace(s),
$"IsPalinromePermutationMinSpace failed with {s}");
}