Answer:
E
Explanation:
We first count the E's only , and reach the seventh E.
B E F B E B I E F S E E D P F E S J E E J D E D E P J E T
Now the seventh E is....
B E F B E B I E F S E E D P F E S J E E J D E D E P J E T
And we can see that the letter follows the seventh is is nothing but E only.
That is the letter next to seventh E is E only.
So answer is E.