**XOR Hexadecimals (Hex)**,

**2 characters at a time**. The output is in

**2 digits**, meaning that

**"0" is written as "00"**.

Hope it helps!

XOR: Exclusive disjunction or exclusive or is a logical operation that outputs true whenever both inputs differ (one is true, the other is false). It is symbolized by infix operator XOR. (Read more at: Wikipedia: XOR)

Hexadecimal: Base 16 numbers, using symbols 0–9 to represent values zero to nine, and A,B,C,D,E,F (or alternatively a–f) to represent values ten to fifteen. (Wikipedia: Hexadecimal)

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