Advanced Loop & Merge in Qualtrics - Multiple random fields

I have a somewhat cumbersome Qualtrics question about randomization/Loop & Merge.

I am trying to run a study where participants answer questions about 10 different scenarios, each of which has two variants (call them A and B). All of these are given by displaying a different .jpg file above a set of the same 3-4 questions. We'd like to randomize whether they see A or B for each individual scenario, but ensure that they see each scenario once. We'd also like to intersperse 4 filler scenarios (only one variant each).

So the survey flow would look something like this:

• Random scenario 1 of 10 (randomly A or B)
• Random scenario 2 of 10 (randomly A or B)
  • Random filler 1 of 4
• Random scenario 3 of 10 (randomly A or B)
• Random scenario 4 of 10 (randomly A or B)
  • Random filler 2 of 4
• Random scenario 5 of 10 (randomly A or B)
• Random scenario 6 of 10 (randomly A or B)
  • Random filler 3 of 4
• Random scenario 7 of 10 (randomly A or B)
• Random scenario 8 of 10 (randomly A or B)
  • Random filler 4 of 4
• Random scenario 9 of 10 (randomly A or B)
• Random scenario 10 of 10 (randomly A or B)

I know how this would work with question or choice randomization, and I know how to do a simple Loop & Merge, but this has me stumped. Is there any way to do this without using a clunky fix such as duplicating the question block ~14 times?

Thanks in advance for your help.