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     a
                          g   
  b       c             h     
e       d                     
                     i       j
     f                        

Incidence matrix

6 * |  4 1  2  2 0 | 2  4 1  4  4 | 2 4  a
* 4 |  0 0  3  3 3 | 0  3 3  6  3 | 3 3  g
----+--------------+--------------+----
2 0 | 12 *  *  * * | 1  1 0  1  0 | 1 2  ab x
2 0 |  * 3  *  * * | 0  0 0  0  4 | 0 4  af q
1 1 |  * * 12  * * | 0  0 0  2  1 | 1 2  ag q
1 1 |  * *  * 12 * | 0  2 1  0  1 | 2 2  ai h
0 2 |  * *  *  * 6 | 0  0 1  2  0 | 2 1  gh x
----+--------------+--------------+----
4 0 |  4 0  0  0 0 | 3  * *  *  * | 0 2  abfd xxxx = verf(oct)
2 1 |  1 0  0  2 0 | * 12 *  *  * | 1 1  abj xhh = verf(tut)
1 2 |  0 0  0  2 1 | *  * 6  *  * | 2 0  aij xhh = verf(tut)
2 2 |  1 0  2  0 1 | *  * * 12  * | 1 1  abih xqxq = verf(co)
2 1 |  0 1  1  1 0 | *  * *  * 12 | 0 2  afg qqh = verf(hip)
----+--------------+--------------+----
3 3 |  3 0  3  6 3 | 0  3 3  3  0 | 4 *  abchij verf(hinnit)
4 2 |  4 2  4  4 1 | 1  2 0  2  4 | * 6  abfdgj verf(pippindip)