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             ___      ______     ___      ______  
    ___     / _ \\   /_____//   / _ \\   /_   _// 
   /   ||  | / \ ||  `____ `   | / \ ||  `-| |,-  
  | [] ||  | \_/ ||  /___//    | \_/ ||    | ||   
   \__ ||   \___//   `__ `      \___//     |_||   
    -|_||   `---`    /_//       `---`      `-`'   
     `-`             `-`

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發送短信 : Logic functions and equations : examples and exercises