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

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