18 lines
209 B
Plaintext
18 lines
209 B
Plaintext
+---+
|
|
| a |
|
|
+---+
|
|
---
|
|
| b |
|
|
---
|
|
|
|
|
|
|
|
v
|
|
+---+
|
|
c --> | u |
|
|
+---+
|
|
^
|
|
|
|
|
|
|
|
|
|
d
|