Instructors can:
Learners can:

1 8 5 3 0 8 1 4 6

5 4 8 9 1 2 0 8 9

7 6 4 1 0 9 7 8 4

9 0 7 4 1 6 2 8

1 8 5 3 0 8 1 4

5 4 8 9 1 2 0 8 9

7 6 4 1 0 9 7 8 4