public void Reformat_1()
        {
            var solution = new _1417_ReformatTheString();
            var result   = solution.Reformat("a0b1c2");

            Assert.AreEqual("0a1b2c", result);
        }
        public void Reformat_5()
        {
            var solution = new _1417_ReformatTheString();
            var result   = solution.Reformat("ab123");

            Assert.AreEqual("1a2b3", result);
        }
        public void Reformat_3()
        {
            var solution = new _1417_ReformatTheString();
            var result   = solution.Reformat("1229857369");

            Assert.AreEqual("", result);
        }
        public void Reformat_4()
        {
            var solution = new _1417_ReformatTheString();
            var result   = solution.Reformat("covid2019");

            Assert.AreEqual("c2o0v1i9d", result);
        }
        public void Reformat_2()
        {
            var solution = new _1417_ReformatTheString();
            var result   = solution.Reformat("leetcode");

            Assert.AreEqual("", result);
        }