sieve.png

 __   ________   ______  ______ 
 \ \ / / __ \ \ / /  _ \|  ____|
  \ V / |  | \ V /| |_) | |__   
   > <| |  | |> < |  _ <|  __|  
  / . \ |__| / . \| |_) | |____ 
 /_/ \_\____/_/ \_\____/|______|