Concatenating adjacent and non adjacent cells depending on entries

I'm trying to write a formula for the grid below that will return a string of hours of operation with the column header (M, T, etc) and the time if not blank. Where I'm stuck is trying to have it return the next non-blank day/time, etc. See the raw grid below and what I'm looking to achieve for each row. It may not be able to be done in one all inclusive formula but any help on how to chunk it out in as few steps as possible would be great.


End results I want to achieve:
Row1= "T10-6, W10-6, W10-6, Th10-8, F10-6, Sa10-5"
Row2="M9-5, T9-5, W9-5, Th9-5, F9-5, Sa9-5"
Row3="M9-6, T9-6, W9-5, Th9-6, F9-3:
Row4="M12-630, T8-3, Th12-7, F9-1, Sa9-1"
Row5="M330-11, W330-11, F330-11"
Row6="M9-5, T9-5, W9-5, Th9-5, F9-5"
Row7="M9-11, W7-8, Th7-9, F9-8"
Row8="M10-11, W7-9, Th6-9, F10-8"