_:e0 _:e1 . _:e0 _:e2 . _:e0 _:e3 . _:e1 _:e0 . _:e1 _:e3 . _:e1 _:e4 . _:e2 _:e0 . _:e2 _:e4 . _:e2 _:e5 . _:e3 _:e0 . _:e3 _:e1 . _:e3 _:e5 . _:e4 _:e1 . _:e4 _:e2 . _:e4 _:e5 . _:e5 _:e3 . _:e5 _:e2 . _:e5 _:e4 . _:e6 _:e7 . _:e6 _:e8 . _:e6 _:e9 . _:e7 _:e6 . _:e7 _:e10 . _:e7 _:e11 . _:e8 _:e6 . _:e8 _:e10 . _:e8 _:e11 . _:e9 _:e6 . _:e9 _:e10 . _:e9 _:e11 . _:e10 _:e7 . _:e10 _:e8 . _:e10 _:e9 . _:e11 _:e7 . _:e11 _:e8 . _:e11 _:e9 .