 sequenceDiagram
      participant DockerExpert  
      participant Helper  
      participant Coder  
  
      DockerExpert->>Helper: Q1  
      Helper->>Coder: q_1  
      Coder->>Helper: a_1  
      Helper->>Coder: q_2  
      Coder->>Helper: a_2  
      Helper->>Coder: q_3  
      Coder->>Helper: a_3  
      Helper->>DockerExpert: A1