c d=2 path done, nodes 11
c d=3 path done, nodes 15
c d=3 cycle done, nodes 15
c d=4 path done, nodes 23
c d=4 cycle done, nodes 24
maxdeg: search nodes 88
  used vertices 5: surfaces with boundary 11 (max dual diameter 2), closed 2 (max 2); with diam >= nv-2: 0 (max diam among orientable ones: with boundary -1, closed -1)
