Gumená redukcia

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