Initial Steps: READY = [A]. Process A. READY = [B,E]. Process B.
Breadth-first adds B's neighbours to the back of READY, depth-first to the front.
Breadth First:
READY = [E,C,G].
process E. READY = [C,G,F].
process C. READY = [G,F,D].
process G. READY = [F,D,H].
process F. READY = [D,H].
process D. READY = [H].
process H. READY = [].
Depth First:
READY = [C,G,E].
process C. READY = [D,G,E].
process D. READY = [G,E].
process G. READY = [H,F,E].
process H. READY = [F,E].
process F. READY = [E].
process E. READY = [].