發送短信 : Injective partial transformations with infinite defects

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