insertion in lists

[Lupe]

hi,

I'm trying to have a kind of multi-dimensional list which seems to me to be
the best way to have an array of not known extension, at the begining of
the program.

if I have:
        element

        list [0]
and want to have list[0][0]
                 list[0][1]

how can I insert the element to that list[0][0], for example?
just to put things clearer, if I wanted to insert the element in list[0] I
could do list.insert(0,element).

I've tried list[0].insert(0,element) but gives me an error.


Luis