Some cron-expression will fail to be parsed.

[joint-song]

Cron expression like 04 28 7-23/4 * * ? cannot be parsed. Java-Quartz works fine, which conforms to the same with crontab guru.

[reugn]

PR #115 resolved the issue with the given example and other compound field cases in the cron expression. Please let me know if you encounter any other cron expression parsing errors.