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

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

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

// cell #1:
0[7]: {1,2,3,4}

// cell #2:
0[8]: {1,2,3,4}