Of which shape is the fence in front of the tub?
The fence is triangular.
    src        edge_attr  dst
0     0  to the right of    1
1     0  to the right of    8
2     1  to the right of   11
3     1  to the right of   12
4     1   to the left of    3
5     1   to the left of    0
6     2   to the left of   15
7     3  to the right of    8
8     3  to the right of    1
9     4  to the right of    9
10    4  to the right of    5
11    5      in front of   13
12    5   to the left of   13
13    5   to the left of    4
14    6   to the left of    8
15    6   to the left of   13
16    7   wrapped around   16
17    7             near   10
18    8   to the left of    3
19    8  to the right of    6
20    8   to the left of    0
21    8  to the right of   11
22    8  to the right of   12
23    8      standing by   13
24    9   to the left of    4
25    9   to the left of   13
26   10           behind   15
27   10             near    7
28   11   to the left of    8
29   11   to the left of    1
30   11   to the left of   13
31   12   to the left of    8
32   12   to the left of    1
33   12   to the left of   13
34   13           behind    5
35   13  to the right of   11
36   13  to the right of   15
37   13      standing by    8
38   13  to the right of    6
39   13  to the right of    5
40   13  to the right of   12
41   13  to the right of    9
42   15   to the left of   13
43   15      in front of   10
44   15  to the right of    2