Study the arrangement carefully and answer the question given below:
@ S T 3 4 G # K ¥ % 9 B
A 6 & 2 U X 8 W Q 1 π $
H L 5 V 7 β
Four of the following five are alike in a certain way based on their positions in the above arrangement and so form a group. Which is the one that does not belong to that group?