From Twitter:
Dr. Jomes and his father are archaeologists digging in Iraq.

Dr. Jomes: Look at this. This is a language I've never....
Dr. Jomes Sr.: Seen before!
Dr. Jomes: You can't figure out any of it?
Dr. Jomes Sr: I can't ①

Choices:
make tails or heads of it
sense of it
make heads or tails of it

The answer and Explanation is make heads or tails of it, which is a common expression meaning figure it out/understand it. To learn why we say this, come to class.