[(a b c e f g)]
[(e f g)]
[(a b c)]
[(a b c)]
[()]
[(1 2)]
[(2 3 4 5)]
[(1 2 3 4 5 6 7 8 9)]
0.40user 0.00system 0:00.41elapsed 99%CPU (0avgtext+0avgdata 33572maxresident)k
0inputs+0outputs (0major+4247minor)pagefaults 0swaps