Could you instead use any two numerical digits? Then you've got a tagging system with up to 100 tags.

This assumes you're writing according to guidelines that insist you spell out all numbers. i.e. 58 is always intentionally "fifty-eight", so "58" must be your own meta text.

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chickensong 5 hours ago | parent | next [-]

I think you can use whatever you want. The point is just to drop a quick marker that you can find later, and not interrupt your flow.

	▲	sublinear 5 hours ago \| parent [-]
		Ah, never mind. A slight refinement needed here. AP style only spells out one through nine. 10 and above are written as numerals. So, you'd get 10 tags, not 100. I think the regex would be: /(?<!\d)\d{1}(?!\d)/

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kazinator 2 hours ago | parent | prev [-]

> writing according to guidelines that insist you spell out all numbers

What? There exists such a guideline, which is not limited to very small numbers that can be written in at most two words?

That would have you writing things like one million, four hundred fifty-three thousand, one hundred fifty-eight instead of 1,453,158.

"TK: for the thousand one hundred and eleventh time, ditch this idiotic editing job"