I’d set this one up just as a 2-dimensional grid. You can get a hint from the way the answers are lain out in the acceptability question; see how the order of the bicycles never changes, but the order of the people does? I’m not sure if this will format right, but you could just diagram it as:

F G H J

Day 1

Day 2

Then, for instance, you could start question 14 by filling in T as the second-day tester of G:

F G H J

Day 1

Day 2 T

And go from there.