Example of a blink cluster

Here are two blinks in rapid succession. Gaze before the first is away from partner, and after the second is towards partner. But is the sequence "BSAA/BSAT" or "BSAB/BSAT", or "BSAT/BSTT". There is no definitive answer. In this case, I decided to go with the last of these alternatives. What do you think?

BlinkSlow Motion