1. Insert the cover of the secret space and take out the keys 2. Place the middle tier of the box on the lower tier. Then set the arrow-keys near the stars in the correct combination. Finally, insert the locking key. Pay attention to the direction of the key. 3. Place the upper tier of

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The letters are representing numbers.

Look closely at the card from both sides — they are related.

Insert the keys and remove the cover of the secret space.

Return four walls on the lower part of the box to the initial state (close the window) to open the keyholes.

Two keys from the upper part of the box serve as keys for this lock.

There are two symbols which will give you a hint about how to open the lock.

Pull out the middle tier of the box to discover the next lock.

The correct combination is given in the first photo. After setting it, pull out the key.

Shift the buttons on the sides so that their arrows point at the suitable constellations. Here are two examples.