A         B                                                          C
|  Time  |  Action                                              |
|     1  |  Adam arrives                                        |
|     2  |  Adam leaves                                         |
|     3  |  Berta arrives                                       |
|     4  |  Berta says: Huhu!                                   |
|     5  |  Berta leaves                                        |  ?
|     6  |  Caesar arrives                                      |
|     7  |  Doris arrives                                       |
|     8  |  Caesar says: Have you recently seen Brutus, Doris?  |
|     9  |  Adam arrives                                        |
|    10  |  Doris says: No! I think he wants to kill you!       |
|    11  |  Adam leaves                                         |  ??
|    12  |  Caesar says: I know                                 |
|    13  |  Doris leaves                                        |  ???
|    14  |  Caesar leaves                                       |  ????