A      B      C       D       E
|      |      |       |       |
  \   /       |       |       |
    F         |       |       |
    |           \     |     /
      \           \   |   /
         \          \ | /
            \         G
               \    /
                  H

Subset L = {A, B, D}
The algorithm should find {F, H}