graph LR
A & B --> C
---
+---+     +---+
|   |     |   |
| A |---->| C |
|   |     |   |
+---+     +---+
            ^  
            |  
            |  
            |  
            |  
+---+       |  
|   |       |  
| B |-------+  
|   |          
+---+