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

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

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

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

// cell #2:
0[2]: {1} --> 2
1[5]: {2} --> 3,4
2[7]: {2} --> 0,3
3[10]: {3} --> 1,2
4[12]: {1} --> 1

// cell #3:
0[3]: {1} --> 2
1[6]: {2} --> 3,4
2[8]: {2} --> 0,3
3[11]: {3} --> 1,2
4[13]: {1} --> 1

// cell #4:
0[4]: {1} --> 1
1[9]: {2} --> 0,2
2[19]: {3} --> 1,3
3[23]: {2} --> 2,4
4[26]: {1} --> 3

// cell #5:
0[14]: {1,2} --> 1
1[17]: {1,3} --> 0,2
2[20]: {2} --> 1

// cell #6:
0[15]: {1,2} --> 1
1[18]: {1,3} --> 0,2
2[21]: {2} --> 1

// cell #7:
0[16]: {1,2} --> 1
1[22]: {1,3} --> 0,2,3
2[24]: {2,3} --> 1
3[25]: {1,2} --> 1