What is the third letter in this Office product code?

[StephenCannon2]

I am evidently supposed to enter five letters/numbers for the final five blanks in my Office product code. However, the third letter is not a letter or an Arabic numeral. It sort of appears to be the right side of a bracket "]", but the product key webpage does not permit me to enter that. The image does not seem to be damaged or marred, so I am at my wits end. Please help.

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