Split Name and Delete Part of it

Hello, i'm trying to rename files like this:

Original: 2015120304N.pdf

Renamed: Someword1 - 2015-12-03 - Someword2.pdf

I know how to add "Someword1 - " and " - Someword2", but i can't figure how to rename from "2015120304N" to "2015-12-03". Please note that i'm deleting the N letter and the last two digits, 04.

Thanks in advance!

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Reply to #1:
Try this Replace Method:

Text to be replaced: (\d{4})(\d{2})(\d{2}).*
Replace with: \1-\2-\3
Use regular expressions: Tick

Summary:
Define three groups (denoted by the parentheses): the first contains 4 digits, and the second and third group 2 digits.
Following the three groups is any series of characters '.*'

In the replace string take each of the three groups '\1', '\2' and '\3' and join them together placing a hyphen in between them.

That has the effect of formatting the date as required while losing the trailing 'fluff'.

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Reply to #2:
Thank you! That solve it!!

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