FRONT

Intersection
input:
{A, B, C}

 FRONT

Intersection
input:
{C, D}

 FRONT

Intersection
input:
{B, C, D}
FRONT

Intersection
input:
{A, C}

 FRONT

Intersection
input:
{A, C, D}

 FRONT

Intersection
input:
{B, D}
FRONT

Intersection
input:
{A, E}

 FRONT

Intersection
input:
{A, B, C, D}

 $$$
(Intersection)
$$$
(Intersection)		 $$$
(Intersection)		 $$$
(Intersection)
$$$
(Intersection)		 $$$
(Intersection)		 $$$
(Intersection)
$$$
(Intersection)		 $$$
(Intersection)		 $$$
(Intersection)