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 __   _     ______    ______    ______   _    _   
| || | ||  /_   _//  /_   _//  /_   _// | |  | || 
| '--' ||   -| ||-     | ||     -| ||-  | |/\| || 
| .--. ||   _| ||_    _| ||     _| ||_  |  /\  || 
|_|| |_||  /_____//  /__//     /_____// |_// \_|| 
`-`  `-`   `-----`   `--`      `-----`  `-`   `-`

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發送短信 : Reductions between types of numberings