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

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

// Individual cells.
// cell #0:
0[0]: {1} --> 1
1[1]: {2} --> 0,2
2[2]: {3} --> 1,3
3[4]: {4} --> 2,4
4[6]: {5} --> 3,5
5[9]: {6} --> 4,6
6[15]: {7,8} --> 5

// cell #1:
0[3]: {1,2} --> 1
1[5]: {1,3} --> 0,2,3
2[7]: {1,4} --> 1,4,5
3[8]: {2,3} --> 1,5
4[10]: {1,5} --> 2,6,7
5[11]: {2,4} --> 2,3,7,8
6[12]: {1,6} --> 4,9,11
7[13]: {2,5} --> 4,5,9,10
8[14]: {3,4} --> 5,10
9[16]: {2,6} --> 6,7,12,14
10[17]: {3,5} --> 7,8,12,13
11[18]: {1,7,8} --> 6,14
12[19]: {3,6} --> 9,10,15,16
13[20]: {4,5} --> 10,15
14[21]: {2,7,8} --> 9,11,16
15[22]: {4,6} --> 12,13,17,18
16[23]: {3,7,8} --> 12,14,18
17[24]: {5,6} --> 15,19
18[25]: {4,7,8} --> 15,16,19
19[26]: {5,7,8} --> 17,18,20
20[27]: {6,7,8} --> 19