I have the following problem:

Suppose I have a tree of data as follows (Labels represent the branches of the tree, Nodes represent data "leaves" contained in the branches): 
Label1
     Node1
     Node2
          Label2
               Node3
                    Label3
                         Node4
                         Node5
                              Label4
                                   Node6.

[download]
I want to move every "label" or "branch" of the tree that contains only one "node" or "leaf" into the highest level of the tree and delete that branch. I basically want to remove the branches that contain one leaf and move the data from that leaf into the highest level of the tree. So for the example I have, I would like it to become the following: 
Label1
     Node1
     Node2
     Node3
     Node6
          Label3
               Node4
               Node5.

[download]
What is the best way to code such a problem, and would any one language be suitable for this task? The data I have is in an excel file so I suppose I could do it in there but I'm looking for a more elegant way to do it, preferably in Perl.
Thanks!

In reply to Moving data in a tree by hoffmann

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