===================================================================================
G-key
                                                                --  --  --  C-
                                                                        B
                                                                --  A-  --  --
                                                                G
-------------------------------------------------------------F-----------------
                                                        E
-----------------------------------------------------D-------------------------
                                                C
---------------------------------------------B---------------------------------
                                        A
------------------------------------G------------------------------------------
                                F
----------------------------E--------------------------------------------------
                        D
--  --  --  --  --  C-
                B
--  --  --  A-  --  --
        G
--  F-  --  --  --  --
E
===================================================================================

Compares scalenodes.
Enter scalenodes separeted by comma, result is same nodes from the textfields

This is just a simple union function of two or three list of items.
Items in the list are separated by comma