a,3781132.280,518657.121,3781174.635,518623.879
b,3782597.579,520987.447,3782639.903,520954.174
c,3781923.614,518501.500,3781965.957,518468.263
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1,3781916.999,520855.911
2,3782580.436,518282.323
3,3781132.280,518657.121
4,3780576.686,520035.901