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

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發送短信 : The sigma chromatic number of the Sierpinski gasket graphs and the Hanoi graphs