Formula, Parse, RegEx?

[IJH34]

HELP!

I am trying to format account numbers in alteryx.

My account numbers are currently displayed as such: 

1234567890

I am trying to display them as:

1234-567-890

What tool/formula do I use to get this result?

I know the answer is right in front of me but I am so lost! 

Thanks in advanced!

[MSalvage · Accepted solution]

@IJH34,

The Regex tool with the following settings should work:(Note: Make sure your account number is a string with large enough size)

Best,

MSalvage