// Cells and their vertices.
#0={0}
#1={1,4,5}
#2={2,6,9}
#3={3,7,11}
#4={8}
#5={10}

// Induced graph on cells.
#0:.
#1:->#0.
#2:->#0.
#3:->#0.
#4:->#1,#2.
#5:->#1,#3.

// Individual cells.
// cell #0:
0[0]: {}

// cell #1:
0[1]: {1} --> 1
1[4]: {2} --> 0,2
2[5]: {1} --> 1

// cell #2:
0[2]: {1} --> 1
1[6]: {2} --> 0,2
2[9]: {1} --> 1

// cell #3:
0[3]: {1} --> 1
1[7]: {2} --> 0,2
2[11]: {1} --> 1

// cell #4:
0[8]: {1,2}

// cell #5:
0[10]: {1,2}