Who Me Too'd this topic

Hi Team 

I have a user who has a requirement to add a custom Data Pattern to identify a specific string 

Example: 1234/09/4578 

(Note the second identifier is a numeric value between [1-9])

I set up the data pattern under " Custom Objects --->Data Pattern ---> Add " in the following format to achieve this  "(/d/d/d/d)/-(/d[1-9])/-(/d/d/d/d)" , but this fails with the following error messge 

test123 -> pattern -> numbers -> regex '(/d/d/d/d)/-(/d[1-9])/-(/d/d/d/d)' is invalid. can't handle two dfas next to each other in pattern '(/d/d/d/d)/-(/d[1-9])/-(/d/d/d/d)'
test123 -> pattern -> numbers -> regex is invalid

But it works without any issues when we put it as  "(/d/d/d/d)/-(/d/d)/-(/d/d/d/d)"

Is this an expected behavior?

Regards

Amogh Gawade