a = [{'a': 1}, {'b': 2}, {'c': 3}]
b = [['c', 'b'], ['c', 'a'], ['b', 'a'], ['c', 'b', 'a']]

temp = {}
for item in a:
temp.update(item)
max = 0
for item in b:
res = 0
for i in item:
res += temp.get(i,0)
if res > max:
max = res
print max