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

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Text this: The structure of the normalisers of the congruence subgroups of the Hecke group G5