[
[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]
]