Find pairs of identical eyes (P); if you open eyes that don't match, all the others will close too.
Take the HAND SYMBOL (Q).
Interact with the lantern.
Take the MOON SYMBOL (R).
Put the HAND SYMBOL on the lock and take the WOODEN HAND (S).
Go into the Guard House.
Take the SWORD (T).
Put the MOON SYMBOL on the lantern and take the LIGHTING ELEMENT (U).