2.3
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                 2                                                                                  2.2
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                    2.1
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                    root                                                                                                                                                                                                               
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                    1.3
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                 1                                                                                  1.2
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                    1.1