This is one of the most complex exercises of the course, since it reproduces the difficulty of exercise 4 but also requires using perpendicular vision and work portals. The objective is:

- Generate the letters O, N and A by using rubber bands

- You have 150 seconds to complete it.

- The letters O, N and A must be seen from the camera, that is, the camera recording must see O, N and A from left to right with the camera, not from the surgeon's position.

- The number of repetitions you will need to complete this exercise is approximately 20.52 (SD 16.2 95% CI 12.19 – 28.85)

In this exercise you should not use the automatic camera, but rather the camera should be carried by hand. However, in case you get "stuck", you can try doing the exercise using the camera automatic. Using the camera automatic makes things easier for you, because it provides you with a "perfect helper." However, this exercise requires a large field of view, which is why it cannot be done completely well with the automatic camera. The automatic one helps you realize who is the best assistant: the one who does not move, keeps the camera fixed on a specific plane and provides a sufficient field of vision!