Graph in Dict structure

 d ='''A -> B

    A -> C

    B -> C

    B -> D

    C -> D

    D -> C

    E -> F

    F -> C'''

e = [i.strip() for i in d.split('\n')]

v = set()

for i in e:

    for j in i:

        if j>='A':

            v.add(j)

v = list(v)

v.sort()

print(e)

print(v)

g = {}

for i in v:

    t = []

    for j in e:

        if i in j:

            for k in j:

                if k>='A' and k<='Z':

                    if k not in i:

                        t.append(k)

    g[i]=t

print(g)