I’ve sorted the pairs in order, and bolded the two outliers.
a0
a1
ac
b0
b1
b4
b5
b7
9b
Other points of interest–91 problems, and you’re another one. Mean things worth worrying about. New boss keeps changing things around.
ac b7 b4
9b b5 a0
b0 b1 a1
What is common between all these? What makes ac and 9b different? Does the order of the sequence matter? Are things re-arranged in this table?
Is this another type of cipher? What are the common kinds of ciphers?