I just took a series of crazy tests for the CIA and my eyes actually crossed!
My head really does hurt!
I couldn't copy and paste but something like
Trains abcdef A meets c B meets d f meets e
due to a fault in the system one train cant be met by any other. Passengers can switch from train to train without stations but one cannot be met by any other. Based on the information above..../
AHHHHHH!