O
E G F A G B A Every other letter is in alphabetical
g.
T
k
o
d
Answer is "o" because a(first letter)-F(6th letter)=different of 5 x+y difference z to u = 5 x-y difference g to l i= 5 x+y difference t to o = 5 x-y
k comes next, and then l.
O
G
The next letter is D. The pattern is every fourth letter. Ie. a b c D e f g H i j k L m n o P and so on...
It's K!