What are the tiles made of?
The tiles are made of brick.
    src        edge_attr  dst
0     0  to the right of   18
1     0  to the right of   19
2     0  to the right of    2
3     2   to the left of    0
4     2   to the left of   14
5     5       covered by   19
6     8  to the right of   10
7    10               on    0
8    10             near   15
9    10   to the left of    8
10   11   to the left of   14
11   11  to the right of   19
12   11  to the right of   18
13   13      floating in   12
14   14  to the right of    2
15   14  to the right of   11
16   15             near   10
17   17           beside   12
18   18   to the left of   11
19   18     covered with   19
20   18   to the left of    0
21   19   to the left of    0
22   19           beside    0
23   19   to the left of   11
24   19         covering    5