sequenceDiagram
  Alice->>Alice: Think
  Alice->>Bob: Result
---
 +-------+    +-----+   
 | Alice |    | Bob |   
 +-------+    +-----+   
     |           |      
     +---+       |      
     |   | Think |      
     <---+       |      
     |           |      
     |  Result   |      
     |----------->      
     |           |      
 +-------+    +-----+   
 | Alice |    | Bob |   
 +-------+    +-----+   
