Make me an alphabet tree
GolfScript (41 chars)

'QZENRPMALHIFKSXJTUVWYGC'8/{' '*n' '+:n}/


Online demo

Connectivity graph:

Q   Z   E   N   R   P   M   A
 \   \   \ /   / \ /   / \ / \
  L   H   I   F   K   S   X   J
   \ / \ / \ /   / \ /   /   /
    T   U   V   W   Y   G   C