NO sq 0 x p s p s p p p p s s s s 0 p s p s x sq s x s p s p s p p s s twice p s p s p p p s s s sq p p p p p p s s s s s s x twice 0 x p p p p s s p s s s 0 p p p s s s p p s s p s p s p s x twice s x p p s s s p p s s s twice p s p s x p p s x p x p s x x p 0 x 0 s s s s s s s s s s s x 0 x x 2.1 sq 0 c_1 sq 0 x p s p s p p p p s s s s 0 p s p s x p s p s p p p p s s s s 0 p s p s c_1 p s x x p s p p p p s s s s 0 p s p s c_1 p s x x p p p p s s s s 0 p s p s c_1 1 1 1 1 1 1 1 1 1 p s x x p p p p s s s s 0 p s c_1 sq 0 c_1 1 0 x x sq c_1 0 1 1 p 1 1 s 1 1 sq 1 c_1 0 c_1 0 4 sq 0 2 ACP 0.72