nested lists

[Felix Fischer]

hi everybody,

i got a new problem. ;-)

my experiment contains three factors: distance, size and angle. i want 
to use nested lists to combine every distance with every size with every 
angle.

how to do this?

at the moment i've got list1 contains attribute size, then nested list2 
with attribute distance and then nested list3 containing different 
angels. the problem is, that not every combination is presented, but 
some more than one time.

i think, i also tried with three (distance, size, angle) lists nested 
under one, and got the same problem.

thank you for your support
f.fischer