Text this: Linear codes over F4R and their MacWilliams identity

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