{"group":"1","z1":-1,"z2":1,"y":3}
{"group":"1","z1":-1,"z2":1,"y":4}
{"group":"1","z1":-1,"z2":1,"y":5}
{"group":"2","z1":0,"z2":-2,"y":4}
{"group":"2","z1":0,"z2":-2,"y":6}
{"group":"2","z1":0,"z2":-2,"y":8}
{"group":"3","z1":1,"z2":1,"y":6}
{"group":"3","z1":1,"z2":1,"y":8}
{"group":"3","z1":1,"z2":1,"y":10}