what is the solution of this exercise ?

# Returns the list of all lists of the form [L[i_0], . . ., L[i_k]] such that: # io<... l . there is no list of the form .. such that: jo ... i_k a strict subset j_k solutions are output in lexicographic order associated tuples will be tested on inputs that for some them too large brute force approach to efficient enough. think recursively. you can assume distinct integers. def f :> >> f( [3, 2, 1]) [[3], [2], [1]] >>> f( [2, 1, 3, 4]) [ [2, 3, 4], [1, 3, 4]] > >> f ( [4, 7, 6, 1, 3, 5, 8, 2]) [ [4, 7, 8], [4, 6, 8], [4, 5, 8], [1, 3, 5, 8], [1, 2]] > >> f( [3, 4, 6, 10, 2, 7, 1, 5, 8, 9]) [ [3, 4, 6, 10], [3, 4, 6, 7, 8, 9], [3, 4, 5, 8, 9], [2, 7, 8, 9 ], [2, 5, 8, 9], [1, 5, 8, 9]] solutions = # INSERT YOUR CODE HERE return solutions POSSIBLY DEFINE ANOTHER FUNCTION if name main ' : import doctest doctest . testmod ()