"My code is not working" is not an issue.

Looks like there are a number of [ and ] floating about. Those should be escaped to make sure they're seen as plain characters and not character ranges.

SyntaxError: Invalid regular expression: /[(?:0(?=[13578])|1(?=[02]))1357802-(?=[0123])(?:0|12|3(?=[01]))[\d]]|[(?:0(?=[469])|1(?=[1]))1469-(?=[0123])(?:0|12|3(?=[0]))[\d]]|[(?:02)(?=-)-(?=[012])(?:0|1|2(?=[^9]))[\d]]/: Unmatched ')'
        at Object.handleError
        at ContextifyScript.Script.runInThisContext
    at Object.runInThisContext

Thanks. Very much appreciated.

Could you put ticks ` around the code, please? Some of it's been formatted as Markdown.

liked push(shift)