Forward, 2x: 2 4 6 2 4 6  
Backward, 2x  (indicating whether each element is the first in the list): 6(false) 4(false) 2 (true) 6(false) 4(false) 2(true)
Backward, from iterator constructed to be @ end of list: 6 4 2
Here are the contents of the reconstituted list:  2 4 6 
(Obviously the contents of the reconstituted list should equal those of the original.)