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GNU GENERAL PUBLIC LICENSE

                       Version 3, 29 June 2007

 Copyright (C) 2007 Free Software Foundation, Inc. 

 Everyone is permitted to copy and distribute verbatim copies

 of this license document, but changing it is not allowed.

                            Preamble

  The GNU General Public License is a free, copyleft license for

software and other kinds of works.

  The licenses for most software and other practical works are designed

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