Leave the toilet, turn left and go straight ahead, until you reach the pair of previously locked doors. Enter the room on the right side and then activate the computer inside. You have access to a few tabs here. The first four are used only as an additional source of knowledge about the game (which should be looked through and listened to!), but the most important tab is the last one, called ARK Tracker.
You will have to scan a little now - if you don't want to find the solution with the "trial and error" method, you should do the following:
- On the first screen select the box second from the left, in the fifth row.
- On the second screen select the box fourth from the left, in the third row.
- On the third screen select the box first from the right, in the third row.
- In the fourth screen select the box third from the left, in the first row.