[Python] Pair data located in the same string, AWK or other [closed]

I have a file with strings like this

1A,1B,1C, 2A,2B,2C,


between the group "1" and the group "2" there is a tab (each string has a different number of elements inside the file); I would need to pair the "A", "B", and "C", and move each pair in a new line; for e.g.

1A-2A
1B-2B
1C-2C


I was looking with AWK or Bash, but I can not come out.

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