Creating a column in a report using text mode

Hi All,

I'm currently working on a Task report where the tasks descriptions contain the iteration ID. Is there a way to create a column in the report to filter out only the ID from the description using text mode? If so, how would that look like?

This is how the description looks like: 

20203363 | R10 | T33 - Description - Submission date

I'd like to add a new column with only the values before the first "-"

Thank you!