發送短信 : Oxygen suffocation for firefighting in underground cavern

  _____     _____     _____     _____     _____   
 |__  //   |  ___||  / ____||  |  ___||  |__  //  
   / //    | ||__   / //---`'  | ||__      / //   
  / //__   | ||__   \ \\___    | ||__     / //__  
 /_____||  |_____||  \_____||  |_____||  /_____|| 
 `-----`   `-----`    `----`   `-----`   `-----`