If everything lines up, this puzzle will take a year to solve. But pick your way through, and don't despair, your reputation depends on it.
Find the missing letters below.
CEVOTCPEGULUNUYA??RABENA
9
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15
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The missing letters are:
RP
Since this 24 letter sequence can be:
Split into 12 pairs of letters, each corresponding to the 3rd and 2nd letters of the months of the year, in reverse order.
This is best illustrated by spelling out each month backwards, starting with December:
REBMECED, REBMEVON, REBOTCO, REBMETPES, etc.
The missing letters correspond to LIRPA.
