Here is the pattern:- Top side: E, G, K- Right side: P, R, VEach letter on the right is 11 letters after the corresponding top letter:- E⟶P- G⟶R- K⟶VNow look at the bottom side: O, J, FThe left side should also be 11 letters after these corresponding letters:- O⟶Z- J⟶U- F⟶QSo the left side becomes:- Z, U, QThat means the missing letter is Z.