Case #1
 Before
                            Before
                           After
                            After
                           Before
                            Before
                           After
                            After
                           Before
                            Before
                           After
                            After
                           
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                            