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#37 LETTER MIX

Which letter belongs in the empty square?

Correct answer: A

Explanation:

The sequence is arranged to form a spiral, see image.

If you put four letters in a group, you will have this:

YAXY
UWTU
QSPQ
MOLM
IKHI
EGDE

ACZA

For the next group all letters are shifted by -4.

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