How to add \t before and after the number using regex

[Valuex]

I get the following text snippet

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a12b
c23d

I would like to add tab before and after the digital number, like

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a  12  b
c  23  d

I've tried to find

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(\d{2})

, and replace it with

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 \t\1\t

, but it doesn't work.
Any comment on how to make this kind of replacement work? Thanks.

[miro.matas]

HTH

[Valuex]

It works! Thank you very much. @miro. matas

[main Alexey]

Documented here! https://wiki.freepascal.org/CudaText#Re ... xpressions