4329.sagews

stnc = 'TARAS'

g = DiGraph({}, loops=True, multiedges=True)

for a,b in [(stnc[i], stnc[i+1]) for i in xrange(len(stnc)-1)]:g.add_edge(a, b, b)
g.plot(color_by_label=True, edge_style='solid').show(figsize=(10,10))