public void ReverseVowels_3()
        {
            var solution = new _0345_ReverseVowelsOfAString();
            var result   = solution.ReverseVowels("Aa");

            Assert.AreEqual("aA", result);
        }
        public void ReverseVowels_1()
        {
            var solution = new _0345_ReverseVowelsOfAString();
            var result   = solution.ReverseVowels("hello");

            Assert.AreEqual("holle", result);
        }
        public void ReverseVowels_2()
        {
            var solution = new _0345_ReverseVowelsOfAString();
            var result   = solution.ReverseVowels("leetcode");

            Assert.AreEqual("leotcede", result);
        }