G:=Group([ [ [ 1, 0, 110, -11 ], [ 11, 1, 1089, -110 ], [ 11, 0, -120, 0 ], 
      [ -1353, 0, 12089, 243 ] ], 
  [ [ -17999, 1800, 10, -17910 ], [ -10, 1, 0, -10 ], 
      [ -1900, 190, 1, -1890 ], [ 18900, -1890, -10, 18801 ] ] ]);