[3,12] + [18,20]
[-6,2] + [4,7] + [10,44] + [50,53]
[-6,2] + [7,40] + [50,53]
[3,14]
[0,3]
[-6,2] + [27,40] + [50,53]
[-10,-2] + [3,10]
[-51,-51] + [-50,-35] + [-30,-20] + [-10,-5] + [10,20] + [30,40]
[-30,-30] + [10,10] + [40,40]
[-40,17]
[-20,10]