Against the Demon Queen (quest)/Riddle

Against the Demon Queen riddle
The riddle in the Book at the entrance contains this text:

A is first to draw blood B and C never cross D strikes close to E F deals the killing blow

There are 6 animals set in randomly for the letters. So if the Text would be:

Mockery is first to draw blood (Monkey) Hungry and Devious never cross (Wolf, Snake) Night strikes close to Grasping (Bat, Octopus) Poisoner deals the killing blow (Scorpion)

The letters would be: * (A) Mockery = Monkey (Wildmen) * (B) Hungry = Wolf (Gnolls) * (C) Devious = Snake (Troglodytes) * (D) Night = Bat (Mephits) * (E) Grasping = Octopus (Mindflayers) * (F) Poisoner = Scorpion (Drow Scorpions)

To unlock the way forward, you must go down the hallways in a certain order. The first hallway is A. The second hallway is either B or C, and the third hallway is either D or E. The fourth hallway is whichever the third wasn't (E or D respectively), and the fifth hallway is whichever second wasn't (C or B respectively). The sixth hallway is always F.

The 4 possible combinations are; * A, B, D, E, C, F * A, C, D, E, B, F  * A, B, E, D, C, F  * A, C, E, D, B, F

Possible patterns
Instances made for this quest are not completely random but choices from presets. With this chart, you can avoid 50/50 bet on second/fifth and third/fourth hallway. However, deliberately choosing a wrong hallway will teleport you to a room with several undead, 4 of which are optional kills for more xp.

in order of A, B/C, D/E, F ; Devious, Mockery/Grasping, Poisoner/Hungry, Night = Snake, Octopus, Wolf, Scorpion, Monkey, Bat (ACEDBF) Devious, Mockery/Poisoner, Grasping/Hungry, Night = Snake, Monkey, Octopus, Wolf, Scorpion, Bat (ABDECF) Grasping, Mockery/Night, Devious/Poisoner, Hungry = Octopus, Bat, Scorpion, Snake, Monkey, Wolf (ACEDBF) Grasping, Night/Mockery, Devious/Hungry, Poisoner = Octopus, Monkey, Snake, Wolf, Bat, Scorpion (ACDEBF) Grasping, Poisoner/Night, Hungry/Mockery, Devious = Octopus, Scorpion, Wolf, Monkey, Bat, Snake (ABDECF) Grasping, Devious/Hungry, Night/Poisoner, Mockery = Octopus, Snake, Bat, Scorpion, Wolf, Monkey (ABEDCF) Hungry, Grasping/Devious, Mockery/Night, Poisoner = Wolf, Octopus, Monkey, Bat, Snake, Scorpion (ABDECF) Hungry, Devious/Night, Mockery/Grasping, Poisoner = Wolf, Snake, Monkey, Octopus, Bat, Scorpion (ABDECF) Hungry, Night/Grasping, Poisoner/Devious, Mockery = Wolf, Bat, Snake, Scorpion, Octopus, Monkey (ABEDCF) Hungry, Poisoner/Mockery, Grasping/Night, Devious = Wolf, Scorpion, Octopus, Bat, Monkey, Snake (ABDECF) Hungry, Poisoner/Night, Mockery/Devious, Grasping = Wolf, Bat, Monkey, Snake, Scorpion, Octopus (ACDEBF) Mockery, Grasping/Poisoner, Hungry/Devious, Night = Monkey, Scorpion, Wolf, Snake, Octopus, Bat (ACDEBF) Mockery, Hungry/Devious, Night/Grasping, Poisoner = Monkey, Snake, Octopus, Bat, Wolf, Scorpion (ACEDBF) Mockery, Night/Devious, Poisoner/Hungry, Grasping = Monkey, Snake, Scorpion, Wolf, Bat, Octopus (ACDEBF) Mockery, Poisoner/Grasping, Devious/Night, Hungry = Monkey, Octopus, Bat, Snake, Scorpion, Wolf (ACEDBF) Night, Grasping/Hungry, Poisoner/Devious, Mockery = Bat, Octopus, Scorpion, Snake, Wolf, Monkey (ABDECF) Night, Mockery/Poisoner, Devious/Grasping, Hungry = Bat, Scorpion, Snake, Octopus, Monkey, Wolf (ACDEBF) Poisoner, Grasping/Devious, Night/Mockery, Hungry = Scorpion, Snake, Bat, Monkey, Octopus, Wolf (ACDEBF) Poisoner, Hungry/Devious, Mockery/Night, Grasping = Scorpion, Wolf, Bat, Monkey, Snake, Octopus (ABEDCF) Poisoner, Hungry/Mockery, Grasping/Night, Devious = Scorpion, Monkey, Bat, Octopus, Wolf, Snake (ACEDBF) Poisoner, Hungry/Night, Mockery/Grasping, Devious = Scorpion, Bat, Octopus, Monkey, Wolf, Snake (ACEDBF) Poisoner, Mockery/Grasping, Night/Hungry, Devious = Scorpion, Monkey, Wolf, Bat, Octopus, Snake (ABEDCF) Poisoner, Mockery/Hungry, Devious/Night, Grasping = Scorpion, Monkey, Bat, Snake, Wolf, Octopus (ABEDCF) Poisoner, Night/Devious, Grasping/Hungry, Mockery = Scorpion, Bat, Wolf, Octopus, Snake, Monkey (ABEDCF)