[-1,0,0,0]
[1,-1,0,0]
[-2,1,0,0]
[0,0,-1,0]
[0,0,1,-1]
[0,0,-2,1]
[0,0,2,-1]
[0,0,-1,1]
[0,0,1,0]
[2,-1,0,0]
[-1,1,0,0]
[1,0,0,0]