sieve.png

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 \ \   / / |/ /  __ \|  __ \|  _ \ 
  \ \_/ /| ' /| |  | | |__) | |_) |
   \   / |  < | |  | |  ___/|  _ < 
    | |  | . \| |__| | |    | |_) |
    |_|  |_|\_\_____/|_|    |____/