// Cells and their vertices.
#0={0}
#1={1}
#2={2,5,10,11}
#3={3,6,8}
#4={4,7,9}
#5={12,13,14,16,17,18,19,21,23,26}
#6={15,20,27}
#7={22,24,25}

// Induced graph on cells.
#0:.
#1:.
#2:->#0,#1.
#3:->#0,#2.
#4:->#1,#2.
#5:->#2,#3,#4.
#6:->#2.
#7:->#5,#6.

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

// cell #1:
0[1]: {}

// cell #2:
0[2]: {1} --> 1
1[5]: {2} --> 0,2,3
2[10]: {4} --> 1
3[11]: {3} --> 1

// cell #3:
0[3]: {2} --> 1,2
1[6]: {3,4} --> 0
2[8]: {1} --> 0

// cell #4:
0[4]: {2} --> 1,2
1[7]: {3,4} --> 0
2[9]: {1} --> 0

// cell #5:
0[12]: {1,2} --> 3,4,5,6
1[13]: {1,3,4} --> 3,4,5,9
2[14]: {1,3,4} --> 3,4,6,9
3[16]: {1,4} --> 0,7
4[17]: {1,3} --> 0,8
5[18]: {2} --> 1
6[19]: {2} --> 2
7[21]: {2,4} --> 3,5,6,9
8[23]: {2,3} --> 4,5,6,9
9[26]: {3,4} --> 7,8

// cell #6:
0[15]: {3,4} --> 1
1[20]: {2} --> 0,2
2[27]: {1} --> 1

// cell #7:
0[22]: {1,3,4} --> 1,2
1[24]: {2,3,4} --> 0
2[25]: {1,2} --> 0