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     a
                          g   
  b       c             h     
e       d                     
                     i       j
     f                        

Incidence matrix

6 * | 1  2  2 0 |  4  4 1 0 | 4 2 0  a
* 4 | 0  3  3 3 |  3  6 3 3 | 3 3 1  g
----+-----------+-----------+------
2 0 | 3  *  * * |  4  0 0 0 | 4 0 0  af q
1 1 | * 12  * * |  1  2 0 0 | 2 1 0  ag q
1 1 | *  * 12 * |  1  2 1 0 | 2 2 0  ai h
0 2 | *  *  * 6 |  0  0 1 2 | 0 2 1  gh x
----+-----------+-----------+------
2 1 | 1  1  1 0 | 12  * * * | 2 0 0  afg qqh = verf(hip)
2 2 | 0  2  2 0 |  * 12 * * | 1 1 0  ahbi qh(-q)h verf(cho)
1 2 | 0  0  2 1 |  *  * 6 * | 0 2 0  aij xhh = verf(tut)
0 3 | 0  0  0 3 |  *  * * 4 | 0 1 1  ghi xxx = verf(tet)
----+-----------+-----------+------
4 2 | 2  4  4 0 |  4  2 0 0 | 6 * *  abfdgj verf(garpop)
3 3 | 0  3  6 3 |  0  3 3 1 | * 4 *  abchij verf(gotto)
0 4 | 0  0  0 6 |  0  0 0 4 | * * 1  ghij tet = verf(pen)