On the Subject of Reverse Alphabetize

You know the alphabet, right? Dvoo, tvg ivzwb gl ovzim rg ztzrm!

The module displays a chalkboard with a letter written backward.

Find which rules in the table below DO NOT apply. If there is an odd number of rules that don’t apply, use the middle one. If there is an even number, use the modern English alphabet backwards.

Select the left side of the chalkboard if the displayed letter matches the LAST letter in the string. If not, select the right side of the chalkboard. Then proceed with the next displayed letter and the previous letter in the string, etc., for 26 stages.

There are exactly three batteriesNZYIFSUJWBDGVCAHMXTKLQEPOR
There are exactly two portsAOXBRYGHWFNLDMJQVZSKCTUPEI
A BOB indicator is present ZPDYVKAUQWMCTLXJNHSGOFEIRB
There is an odd number of strikes (during initialization)RYCBENFZVQTSLWPXMKAGIHJUDO
There is an odd number of indicatorsALDNUBSTVRXZOWFCIHEJGPQYKM
An FRK indicator is present OMRSNCGTZYDFQAVPIBXHELKUJW
The first numeric digit of the serial number is oddUHKTLEPQNJMIZOCDRWVSXFBAYG
There are exactly two indicatorsEBUYZLRCDXWOKQIGTAMSNPHVFJ
There is an even number of strikes (during initialization)YQMGRPFHSUNCEZTABVWKLDJIOX
There are at least three letters in the serial number XBOJNYQUZFVALTKPGCWESRHIMD
There are less than two indicators on the bombTWGCYNBXQKAUDZEJIMROSLHFVP
The number of solved modules is less than five (during initialization)KTPQBJCEISAYZNOUXGMRDWLHVF
There is no even digit in the serial numberDXUAGEHMCJTOQSLRWPFVZBINKY
There are more than thirty modules on the bombCBDJUHOVLFIKSXPZRWQGETYAMN
The number of battery holders is less than threeJIYEPUCAFKGNOQBWZDVLXMRTSH

If a strike is given, the module will reset back from the beginning. Some rules may differ now if the module is reinitialized.

The Chalk: Obverse & Reverse

ObverseReverse
AA
BB
CC
DD
EE
FF
GG
HH
II
JJ
KK
LL
MM
ObverseReverse
NN
OO
PP
QQ
RR
SS
TT
UU
VV
WW
XX
YY
ZZ