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           _    _    __   _     ______    _  __  
  ____    | || | || | || | ||  /_   _//  | |/ // 
 |    \\  | || | || | '--' ||   -| ||-   | ' //  
 | [] ||  | \\_/ || | .--. ||   _| ||_   | . \\  
 |  __//   \____//  |_|| |_||  /_____//  |_|\_\\ 
 |_|`-`     `---`   `-`  `-`   `-----`   `-` --` 
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Text this: Colourings of Cyclotomic Integers with Class Number One