How to split and retrieve a value ?

I think we may need regex for this and I am not good at it. I need to be able to extract the last part i.e. (TMNT-1752) from the below string . In some cases the numeric part could be three or more digits too like CMNU-112 or NT=1223 etc or TURC-12223. I think I want the part that comes after selectedIssue=. https://phut.mayhem.com/secure/JapidJoard.jspa?rapidView=12339&view=detail&selectedIssue=TMNT-1752