Regex for 2 conditions

[nziadat]

Hello! I am using kobo forms for a field survey.
I wrote a regex for one number string to match and now need to add another for 2 possible answers

It should be 000-00C00000 or 000-00-0000
regex(.,'^[0-9]{3}-[0-9]{2}[C-][0-9]{5}$') | (,.'^[0-9]{3}-[0-9]{2}-[0-9]{4}$')

The field enumerator should be able to input only either of these number formats.

I have written the expression many ways to test but I am unable to apply it. Please help. Thank you in advance.

[ARIF_AZAD_KHAN]

It should work on mobile end

[nziadat]

@ARIF_AZAD_KHAN

(., '^([0-9]{3}++[0-9]{2}+[C]+[0-9]{5})$') or regex(., '^([0-9]{3}++[0-9]{2}++[0-9]{3})$')

Thank you! I have tried this but it does not work. I need for one or the other option to be valid for entry and no other version.

[nziadat]

Thanks I was not able to use this regex either.