+x1,+x2,+x3,+x4
-x1,+x2,+x3,1/2-x4
+x1,-x2,1/2+x3,+x4
-x1,-x2,1/2+x3,1/2-x4
-x1,-x2,-x3,-x4
+x1,-x2,-x3,-1/2+x4
-x1,+x2,-1/2-x3,-x4
+x1,+x2,-1/2-x3,-1/2+x4
1/2+x1,1/2+x2,+x3,+x4
1/2-x1,1/2+x2,+x3,1/2-x4
1/2+x1,1/2-x2,1/2+x3,+x4
1/2-x1,1/2-x2,1/2+x3,1/2-x4
-1/2-x1,-1/2-x2,-x3,-x4
-1/2+x1,-1/2-x2,-x3,-1/2+x4
-1/2-x1,-1/2+x2,-1/2-x3,-x4
-1/2+x1,-1/2+x2,-1/2-x3,-1/2+x4
