label below edge

Edge labels below the edge

Hi all, is it possible in graphs an edge label below the edge as well as above it?
Like this: http://people.engr.ncsu.edu/efg/210/s99/Notes/fsm/horner.gif

My objective is to have the edge label above state a condition, and the label below an action.

I tried using xlabel, but the placement and overlapping is not as I intended (tried to correct it though, bu without luck).

Thank you for any help.

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