Redukcia13/7-pólová

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  / /_    _   _  |  _ \      | | |___ \   _   _ 
 | '_ \  | | | | | |_) |  _  | |   __) | | | | |
 | (_) | | |_| | |  _ <  | |_| |  / __/  | |_| |
  \___/   \__,_| |_| \_\  \___/  |_____|  \__,_|