To be honest, I’ve learnt but forgotten this as shortenings are really one of my learning pains, however here’s Course guide to Level 2 Southern which until someone answers your question, might be of any help to find equivalent of “Meddan nhw” in it.
Since you didn’t write which Challenge this is in I couldn’t find anything cruising through audio files, but to be honest I didn’t take a look into this guide either.
Hope you manage to find something in the mean time until someone comes along and answers your question.