                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                            Preamble

This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published 
by the Free Software Foundation, either version 3 of the License, 
or (at your option) any later version