A simple list question.

[KraftDiner]

I am trying to implement a two dimensional array.
mylist = [[a,b,c],[d,e,f,c],[g,h,i]]

So the array is of length 3 here...
So how do I initialize this array and then set each object?
At some point in my code I know there will be 3 lists in the list.
So how do I initialize this list such that I can access them
as elements... like
mylist[1] = [c,f,g]
in random order...