Help needed parsing time about superpower HOT 6 CLOSED

    [TestClass]
    public class BugTests
    {
        private static readonly TextParser<TextSpan> Word = Identifier.CStyle;
        public enum BugToken
        {
            NumberRange,

            Word
        }

        public static TextParser<string> CommaRange { get; } = from _ in Character.EqualTo(',')
                                                               from __ in Character.WhiteSpace.IgnoreMany()
                                                               from number1 in Numerics.IntegerInt32
                                                               select $", {number1}";

        public static TextParser<string> DashRange { get; } = from _ in Character.EqualTo('-')
                                                              from __ in Character.WhiteSpace.IgnoreMany()
                                                              from number1 in Numerics.IntegerInt32
                                                              from ___ in Character.WhiteSpace.IgnoreMany()
                                                              from step in BugTests.StepRange.OptionalOrDefault()
                                                              select $"-{number1}{step?.Trim()}";

        public static TextParser<RepRange> Range { get; } = from number1 in Numerics.IntegerInt32
                                                            from __ in Character.WhiteSpace.IgnoreMany()
                                                            from subranges in WorkoutTextParser.CommaRange.Try().Or(BugTests.DashRange).AtLeastOnce()
                                                            select new RepRange(number1 + string.Join(string.Empty, subranges));

        public static TextParser<string> StepRange { get; } = from _ in Character.EqualToIgnoreCase('x')
                                                              from __ in Character.WhiteSpace.IgnoreMany()
                                                              from number1 in Numerics.IntegerInt32
                                                              select $" x{number1}";

        [TestMethod]
        public void Bug()
        {
            var tokens = BugTests.CreateTokenizer().Tokenize("15-20 kettlebell swings");

            tokens.Count().Should().Be(3);
            tokens.ElementAt(0).Kind.Should().Be(BugToken.NumberRange);
            tokens.ElementAt(0).ToStringValue().Should().Be("15-20");
        }

        public static Tokenizer<BugToken> CreateTokenizer()
        {
            var builder = new TokenizerBuilder<BugToken>();

            return builder.Match(BugTests.Range, BugToken.NumberRange).Match(BugTests.Word, BugToken.Word).Ignore(Span.WhiteSpace).Build();
        }
    }