Thunno, \$ 70 \log_{256}(96) \approx \$ 57.62 bytes
AZ7RAI'#d""TrsZ!.J15343bZZgAJ'1=k.AKDz0sAh212212 221222ZPz1AIdz(0ZN+AI
A very long port of Kevin Cruijssen's 05AB1E answer.
Explanation
AZ7RAI # The first 7 letters of the alphabet, A to G
'#d '# The list ['#']
""T # With "" appended to it
r # Reversed
sZ! # Then take the cartesian product of that and A-G
.J # Join each inner list
15343bZZ # Zipped with the binary representation of 15343
g # Filtered of where:
AJ # the first element
'1= '# is a 1
k # (End filter)
.AK # Last element of each
D # Duplicate this
z0sAh # Get the index of the first input in this list
212212 # The number 212212
221222 # And the number 221222
ZP # Paired together
z1AI # Index the second input into this list
dz( # Cumulative sums of this number
0ZN # With a 0 prepended
+ # Added to the index of the first input in the list
AI # Indexed into that list
# Implicit output