  \(c) at (0,0) ;  \(0) at (0,0) ; (0b) at (0,0) ; (0) at (0,0) ; (0) at (-0,0) ; (0) at (-0,0) ; (0b) at (0,0) ; (0b) at (0,0) ; (0b) at (0,0) ; (0b) at (0,0) ;  \(0) to (c); (0b) to (c); (c) to (0) to (0) to (0); (c) to (0b) to (0b) to (0b) to (0b);  