Day 14

Ok I know all of you are past this....So let me ask it here since hw removed my topic on the boards...
WTF is up with day 14 and the Evil boardroom doors???

I can get the first 5 doors open and I cant get the sixth! no matter what the combo, I tried all the doors for the 6th door.
I even tried to use the following in case there was a fork in the combo:
a,b
a,c
a,d ....etc

then I would do :
a,i,b
a,i,c....etc

and on and on without being able to open a sixthd door...

IS THERE SOMETHING I AM MISSING? and the clue I get for figuring out the sixth door:
"The fourth door is 0 letters lower down the alphabet than the sixth door"

ARGH I AM M@%$@F@#$ing pissed off.....anyone got help on this?

ok if you get that you need to reset you door order

THIS PARTICULAR ADVENTURE SIMPLY SUKS!!!!!!!!!!!!

NO LOGIC WHATSOEVER!!!!!