\Diagram & & F(3,2) \aLine (1,-4) >{F(3,1,1)} :{.4} \br \\ & & & \rdLine >{F(1,2,2)} \pt {right,.75} \\ & & & & F(1,4) \\ F(2,3) \aDash (4,1) ^{F(1,1,3)} :{.4} \pp \\ & & & F(4,1) \aLine (1,2) >{F(1,3,1)} \\ \Modify \Pt {top} (2,4) \Pt {b1} (0,1) \Pt {b2} (3,0) \Pt {LeftF} (1.65,2) \Pt {BackF} (2,2.5) \Pt {BottomF} (2.5,1) \Pt {RightF} (3.1,2.25) \Nul \pt {b1} \pt {b2} \pt {bottom,.8} \Nul \pt {BottomF} \pt {bottom} \pt {BottomL,2} \Dash \pt {BottomF} \pt {bottom} \tl \circ \dt {3pt} \Line \pt {bottom} \pt {BottomL} \hd {F(1,1,2,1)} \Line \pt {b1} \pt {b2} _{F(2,2,1)} \br \Nul \pt {b1} \pt {top} \pt {left,.25} \pt {back,.75} \Nul \pt {BackF} \pt {back} \pt {BackL,2} \Nul \pt {LeftF} \pt {left} \pt {LeftL,2} \Dash \pt {BackF} \pt {back} \tl \circ \dt {3pt} \Line \pt {back} \pt {BackL} \hd {F(1,1,1,2)} \Line \pt {b1} \pt {top} <{F(2,1,2)} \br \Line \pt {LeftF} \pt {LeftL} \tl \bullet \hd {F(2,1,1,1)} \jt \br \Nul \pt {RightF} \pt {right} \pt {RightL,3} \Line \pt {RightF} \pt {RightL} \tl \bullet \hd {F(1,2,1,1)} \jt \br \endDiagram