M

                            |  
                            |
                            |

                            A
                            
                          /   \
                         /     \
                        /       \
                       /         \
                      /           \
                    v/             \v
                    /               \
                   /                 \
                  /                   \
                 /                     \
                                          
               B                         C
                                             
                 \                     /   \
                 v\                   /v    \v
                   \                 /       \
                                                   
                     D             E           K
                                                      
                       \         /   \       /   \
                       v\       /v    \     /     \
                         \     /       \   /       \
                                                       
                            F            I           L
                                                        
                            |            | \       /
                            |            |  \     /
                            |            |   \   /
                                              
                            G            J     N
                                  
                            | 
                            |
                            |
                                 
                            H