A + B means ‘A is the father of B’
A - B means ‘A is the mother of B’
A * B means ‘A is the sister of B’
A % B means ‘A is the husband of B’
If A % B - C + D * E, then how is A related to E?

A

Father’s father

B

Brother

C

Father’s brother

D

Father-in-law