If the first and second letters in the word 'COMMUNICATIONS' are interchanged, also the third and fourth letters, the fifth and sixth letters and so on, which letter would be the 10th letter counting from your right?
Explanation:
Word: C O M M U N I C A T I O N S. Interchange pairs: O C M M N U C I T A O I S N. From right: N S I O A T I C U N M M C O. 10th from right is U.
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