Q: Apple TV keypad. Which character is - and which is _

I'[m struggling to configure my 3rd gen Apple TV with a new fibre broadband router (it worked fine with the old one).

There may be more to it than this, but at the moment I'm struggling to input the new network password using the Apple remote and clicking through the onscreen alpha numeric keypad. My new password has dashes - rather than underscores _ but all three screens of the text input only seem to offer underscores.

Is there a ket that can be accessed on screen using the Apple remote that produces a dash? i.e   -  instead of   _