Pair by pair, each of the digits appear
all paired but one - fixed right in the middle
Look from the front, it's the same from the rear.
Invert, reflect, how ever you fiddle,
never does it change, though the digits shift.
Do as this poem says, and ye shall find
relish and joy inside my little gift.
Open it, log, and leave a note in kind.
May you have fun with this little teaser,
even though it made you a bit busier!
You can check if you were able to figure this one out here.