How to input a vector of group generators?
In order to enter a vector, first enter '[', then enter the elements of the
vector seperated by commas, and finally enter ']'.
Since the entries of the vector are permutations you must know how to
input a permutation.
For instance the generators of the symmetric group of three elements could
be entered as [[2,3,1],[2,1,3]]. (All generators must be permutations of
the same length!).