The idea for the code was obviously a slot machine type rotating wheel. In this case we need a starting string.
Adjusting each 'column' up and potentially wrapped around so that all 16 hex chars are iterated thru per column.


in this case '22b7c5a' is adjusted to '32b7c5a', '42b7c5a', '52b7c5a', '62b7c5a' - '12b7c5a'

then direction adjusts to the next column  '23b7c5a', 24b7c5a', '25b7c5a', '26b7c5a' - '21b7c5a'

This is more visually representative.
22
32
42
52
62
72
82
92
a2
b2
c2
d2
e2
f2
02
12