public void IsAnagram2Test()
        {
            var inputs1 = new[] {
                "anagram",
                "rat"
            };
            var inputs2 = new[] {
                "nagaram",
                "car"
            };
            var expecteds = new[] { true, false };


            foreach (var((s, t), expected) in inputs1.Zip(inputs2).Zip(expecteds))
            {
                ValidAnagram.IsAnagram2(s, t).Should().Be(expected);
            }
        }