[
  [906848,906850,906852,906854],
  [906856,906858,906860,906862],
  [906864,906866,906868,906870],
  [906872,906874,906876,906878],
  [906880,906882,906884,906886],
  [906888,906890,906892,906894],
  [906896,906898,906900,906902],
  [906904,906906,906908,906910],
  [906912,906914,906916,906918],
  [906920,906922,906924,906926],
  [906928,906930,906932,906934],
  [906936,906938,906940,906942],
  [906944,906946,906948,906950],
  [906952,906954,906956,906958],
  [906960,906962,906964,906966],
  [906968,906970,906972,906974]
]