// Cells and their vertices.
#0={0,1,3,6,7,10}
#1={2,5,9,12}
#2={4,8,11,13}
#3={14}

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

// Individual cells.
// cell #0:
0[0]: {1,2} --> 3
1[1]: {1,4} --> 3,4
2[3]: {3,4} --> 4
3[6]: {1,3} --> 0,1,5
4[7]: {2,4} --> 1,2,5
5[10]: {2,3} --> 3,4

// cell #1:
0[2]: {1,2,3} --> 1
1[5]: {1,2,4} --> 0,2
2[9]: {1,3,4} --> 1,3
3[12]: {2,3,4} --> 2

// cell #2:
0[4]: {2,3,4} --> 1
1[8]: {1,3,4} --> 0,2
2[11]: {1,2,4} --> 1,3
3[13]: {1,2,3} --> 2

// cell #3:
0[14]: {1,2,3,4}