g := PSigmaL(2,9); invols := [ [g| (1, 5)(6, 7)(9, 10) , (1, 2)(3, 9)(6, 10)(7, 8) , (2, 3)(4, 8)(9, 10) ], [g| (1, 5)(6, 7)(9, 10) , (1, 2)(3, 9)(6, 10)(7, 8) , (1, 5)(2, 3)(4, 8)(6, 7) ], [g| (1, 6)(4, 8)(5, 7) , (1, 10)(2, 6)(7, 8) , (1, 5)(6, 7)(9, 10) , (3, 9)(4, 5)(7, 8) ], [g| (1, 5)(6, 7)(9, 10) , (3, 9)(4, 5)(7, 8) , (2, 4)(3, 8)(6, 7)(9, 10) , (1, 10)(3, 4)(5, 9) ], [g| (2, 7)(5, 9)(6, 8) , (1, 5)(6, 7)(9, 10) , (2, 9)(3, 10)(5, 7) , (1, 10)(3, 4)(5, 9) ], [g| (1, 5)(6, 7)(9, 10) , (2, 9)(3, 10)(5, 7) , (1, 5)(2, 4)(6, 10)(7, 9) , (2, 3)(4, 8)(9, 10) ], [g| (1, 6)(4, 8)(5, 7) , (1, 10)(3, 4)(5, 9) , (2, 10)(4, 7)(5, 8) , (1, 5)(6, 7)(9, 10) , (3, 9)(4, 5)(7, 8) ] ];