Directions (17-21): Study the following arrangement carefully and answer the questions given below:
7 R E T 4 A 9 % D F 1 U # B @ 8 H I © W M _ 3 2 V $ 5 N P 6 Q
Four of the following five are alike in a certain way based on their position in the above arrangement and so form a group. Which is the one that does not belong to the group?
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